diff --git a/.vscode/tasks.json b/.vscode/tasks.json
index a5a125a4339e..f4384e2537bf 100644
--- a/.vscode/tasks.json
+++ b/.vscode/tasks.json
@@ -9,63 +9,65 @@
     "tasks": [
         {
             "label": "Compile",
-            "type": "npm",
-            "script": "compile",
-            "isBackground": true,
-            "problemMatcher": [
-                "$tsc-watch",
-                {
-                    "base": "$tslint5",
-                    "fileLocation": "relative"
-                }
-            ],
-            "group": {
-                "kind": "build",
-                "isDefault": true
-            }
-        },
-        {
-            "label": "Hygiene",
             "type": "gulp",
-            "task": "hygiene-watch",
+            "task": "watch",
             "isBackground": true,
             "presentation": {
                 "echo": true,
-                "reveal": "always",
+                "reveal": "never",
                 "focus": false,
-                "panel": "shared"
+                "panel": "dedicated"
             },
             "problemMatcher": [
-                "$tsc-watch",
                 {
-                    "base": "$tslint5",
-                    "fileLocation": "relative"
+                    "applyTo": "allDocuments",
+                    "fileLocation": "relative",
+                    "background": {
+                        "beginsPattern": {
+                            "regexp": "^Hygiene started"
+                        },
+                        "endsPattern": {
+                            "regexp": "^(Hygiene failed with errors|Hygiene passed with 0 errors)"
+                        }
+                    },
+                    "pattern": [
+                        {
+                            "regexp": "^([^\\s].*)\\((\\d+|\\d+,\\d+|\\d+,\\d+,\\d+,\\d+)\\):\\s+(error|warning|info)\\s+(TS\\d+)\\s*:\\s*(.*)$",
+                            "file": 1,
+                            "location": 2,
+                            "severity": 3,
+                            "code": 4,
+                            "message": 5
+                        }
+                    ]
+                },
+                {
+                    "applyTo": "allDocuments",
+                    "fileLocation": "relative",
+                    "background": {
+                        "beginsPattern": {
+                            "regexp": "^Hygiene started"
+                        },
+                        "endsPattern": {
+                            "regexp": "^(Hygiene failed with errors|Hygiene passed with 0 errors)"
+                        }
+                    },
+                    "pattern": [
+                        {
+                            "regexp": "^(WARNING|ERROR):(\\s+\\(\\S*\\))?\\s+(\\S.*)\\[(\\d+), (\\d+)\\]:\\s+(.*)$",
+                            "severity": 1,
+                            "file": 3,
+                            "line": 4,
+                            "column": 5,
+                            "message": 6
+                        }
+                    ]
                 }
             ],
             "group": {
                 "kind": "build",
                 "isDefault": true
             }
-        },
-        {
-            // Task that will replace 'Compile' and 'Hygiene', after being battle-tested.
-            "label": "Watch",
-            "type": "gulp",
-            "task": "watch",
-            "isBackground": true,
-            "presentation": {
-                "echo": true,
-                "reveal": "always",
-                "focus": false,
-                "panel": "shared"
-            },
-            "problemMatcher": [
-                "$tsc-watch",
-                {
-                    "base": "$tslint5",
-                    "fileLocation": "relative"
-                }
-            ]
         }
     ]
 }
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 9f47d7b88769..ef238b941add 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -28,14 +28,11 @@ You may see warnings that ```The engine "vscode" appears to be invalid.```, you
 
 ### Incremental Build
 
-Run the `Compile` and `Hygiene` build Tasks from the [Command Palette](https://code.visualstudio.com/docs/editor/tasks) (short cut `CTRL+SHIFT+B` or `⇧⌘B`)
+Run the `Compile` build Tasks from the [Command Palette](https://code.visualstudio.com/docs/editor/tasks) (short cut `CTRL+SHIFT+B` or `⇧⌘B`)
 
 ### Errors and Warnings
 
-TypeScript errors and warnings will be displayed in VS Code in the following areas:
-* Problems Panel (`CTRL+SHIFT+M` or `⇧⌘M`)
-* Terminal running the `Compile` task
-* Terminal running the `Hygiene` task
+TypeScript errors and warnings will be displayed in the `Problems` window of Visual Studio Code:
 
 ### Validate your changes
 
diff --git a/gulpfile.js b/gulpfile.js
index 558e83ff013f..05918ab7bc6d 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -19,6 +19,8 @@ const path = require('path');
 const debounce = require('debounce');
 const jeditor = require("gulp-json-editor");
 const del = require('del');
+const sourcemaps = require('gulp-sourcemaps');
+const fs = require('fs');
 
 /**
 * Hygiene works by creating cascading subsets of all our files and
@@ -53,6 +55,13 @@ const tslintFilter = [
     '!**/typings/**/*',
 ];
 
+const copyrightHeader = [
+    '// Copyright (c) Microsoft Corporation. All rights reserved.',
+    '// Licensed under the MIT License.',
+    '',
+    '\'use strict\';'
+].join('\n');
+
 gulp.task('hygiene', () => run({ mode: 'all', skipFormatCheck: true, skipIndentationCheck: true }));
 
 gulp.task('compile', () => run({ mode: 'compile', skipFormatCheck: true, skipIndentationCheck: true, skipLinter: true }));
@@ -105,6 +114,18 @@ gulp.task('cover:disable', () => {
 const hygiene = (options) => {
     options = options || {};
     let errorCount = 0;
+    const addedFiles = getAddedFilesSync();
+    console.log(colors.blue('Hygiene started.'));
+
+    const copyrights = es.through(function (file) {
+        if (addedFiles.indexOf(file.path) !== -1 && file.contents.toString('utf8').indexOf(copyrightHeader) !== 0) {
+            // Use tslint format.
+            console.error(`ERROR: (copyright) ${file.relative}[1,1]: Missing or bad copyright statement`);
+            errorCount++;
+        }
+
+        this.emit('data', file);
+    });
 
     const indentation = es.through(function (file) {
         file.contents
@@ -245,7 +266,8 @@ const hygiene = (options) => {
     }
 
     result = result
-        .pipe(filter(tslintFilter));
+        .pipe(filter(tslintFilter))
+        .pipe(copyrights);
 
     if (!options.skipFormatCheck) {
         // result = result
@@ -259,8 +281,18 @@ const hygiene = (options) => {
 
     result = result
         .pipe(tscFilesTracker)
+        .pipe(sourcemaps.init())
         .pipe(tsc())
-        .js.pipe(gulp.dest(dest))
+        .pipe(sourcemaps.mapSources(function (sourcePath, file) {
+            const tsFileName = path.basename(file.path).replace(/js$/, 'ts');
+            const qualifiedSourcePath = path.dirname(file.path).replace('out/', 'src/').replace('out\\', 'src\\');
+            if (!fs.existsSync(path.join(qualifiedSourcePath, tsFileName))) {
+                console.error(`ERROR: (source-maps) ${file.path}[1,1]: Source file not found`);
+            }
+            return path.join(path.relative(path.dirname(file.path), qualifiedSourcePath), tsFileName);
+        }))
+        .pipe(sourcemaps.write('.', { includeContent: false }))
+        .pipe(gulp.dest(dest))
         .pipe(es.through(null, function () {
             if (errorCount > 0) {
                 const errorMessage = `Hygiene failed with errors 👎 . Check 'gulpfile.js'.`;
@@ -275,6 +307,8 @@ const hygiene = (options) => {
             this.emit('end');
         }))
         .on('error', exitHandler.bind(this, options));
+
+    return result;
 };
 
 /**
@@ -320,10 +354,17 @@ function run(options) {
 }
 function getStagedFilesSync() {
     const out = cp.execSync('git diff --cached --name-only', { encoding: 'utf8' });
-    const some = out
+    return out
         .split(/\r?\n/)
         .filter(l => !!l);
-    return some;
+}
+function getAddedFilesSync() {
+    const out = cp.execSync('git status -u -s', { encoding: 'utf8' });
+    return out
+        .split(/\r?\n/)
+        .filter(l => !!l)
+        .filter(l => l.startsWith('A') || l.startsWith('??'))
+        .map(l => path.join(__dirname, l.substring(2).trim()));
 }
 
 /**
diff --git a/package.json b/package.json
index d8012fe1d4ec..95e667811ed2 100644
--- a/package.json
+++ b/package.json
@@ -1713,6 +1713,7 @@
         "gulp-filter": "^5.0.1",
         "gulp-gitmodified": "^1.1.1",
         "gulp-json-editor": "^2.2.1",
+        "gulp-sourcemaps": "^2.6.4",
         "gulp-typescript": "^3.2.2",
         "gulp-watch": "^4.3.11",
         "husky": "^0.14.3",
diff --git a/yarn.lock b/yarn.lock
index d335c463c1e8..f15a98a57319 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2,6 +2,23 @@
 # yarn lockfile v1
 
 
+"@gulp-sourcemaps/identity-map@1.X":
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/@gulp-sourcemaps/identity-map/-/identity-map-1.0.1.tgz#cfa23bc5840f9104ce32a65e74db7e7a974bbee1"
+  dependencies:
+    acorn "^5.0.3"
+    css "^2.2.1"
+    normalize-path "^2.1.1"
+    source-map "^0.5.6"
+    through2 "^2.0.3"
+
+"@gulp-sourcemaps/map-sources@1.X":
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/@gulp-sourcemaps/map-sources/-/map-sources-1.0.0.tgz#890ae7c5d8c877f6d384860215ace9d7ec945bda"
+  dependencies:
+    normalize-path "^2.0.1"
+    through2 "^2.0.3"
+
 "@types/chai-as-promised@^7.1.0":
   version "7.1.0"
   resolved "https://registry.yarnpkg.com/@types/chai-as-promised/-/chai-as-promised-7.1.0.tgz#010b04cde78eacfb6e72bfddb3e58fe23c2e78b9"
@@ -141,6 +158,10 @@ abbrev@1.0.x:
   version "1.0.9"
   resolved "https://registry.yarnpkg.com/abbrev/-/abbrev-1.0.9.tgz#91b4792588a7738c25f35dd6f63752a2f8776135"
 
+acorn@5.X, acorn@^5.0.3:
+  version "5.5.3"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.5.3.tgz#f473dd47e0277a08e28e9bec5aeeb04751f0b8c9"
+
 ajv@^4.9.1:
   version "4.11.8"
   resolved "https://registry.yarnpkg.com/ajv/-/ajv-4.11.8.tgz#82ffb02b29e662ae53bdc20af15947706739c536"
@@ -360,6 +381,10 @@ atob@^2.0.0:
   version "2.0.3"
   resolved "https://registry.yarnpkg.com/atob/-/atob-2.0.3.tgz#19c7a760473774468f20b2d2d03372ad7d4cbf5d"
 
+atob@~1.1.0:
+  version "1.1.3"
+  resolved "https://registry.yarnpkg.com/atob/-/atob-1.1.3.tgz#95f13629b12c3a51a5d215abdce2aa9f32f80773"
+
 aws-sign2@~0.6.0:
   version "0.6.0"
   resolved "https://registry.yarnpkg.com/aws-sign2/-/aws-sign2-0.6.0.tgz#14342dd38dbcc94d0e5b87d763cd63612c0e794f"
@@ -757,7 +782,7 @@ console-control-strings@^1.0.0, console-control-strings@~1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/console-control-strings/-/console-control-strings-1.1.0.tgz#3d7cf4464db6446ea644bf4b39507f9851008e8e"
 
-convert-source-map@^1.1.1:
+convert-source-map@1.X, convert-source-map@^1.1.1:
   version "1.5.1"
   resolved "https://registry.yarnpkg.com/convert-source-map/-/convert-source-map-1.5.1.tgz#b8278097b9bc229365de5c62cf5fcaed8b5599e5"
 
@@ -785,12 +810,27 @@ cryptiles@3.x.x:
   dependencies:
     boom "5.x.x"
 
+css@2.X, css@^2.2.1:
+  version "2.2.1"
+  resolved "https://registry.yarnpkg.com/css/-/css-2.2.1.tgz#73a4c81de85db664d4ee674f7d47085e3b2d55dc"
+  dependencies:
+    inherits "^2.0.1"
+    source-map "^0.1.38"
+    source-map-resolve "^0.3.0"
+    urix "^0.1.0"
+
 currently-unhandled@^0.4.1:
   version "0.4.1"
   resolved "https://registry.yarnpkg.com/currently-unhandled/-/currently-unhandled-0.4.1.tgz#988df33feab191ef799a61369dd76c17adf957ea"
   dependencies:
     array-find-index "^1.0.1"
 
+d@1:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/d/-/d-1.0.0.tgz#754bb5bfe55451da69a58b94d45f4c5b0462d58f"
+  dependencies:
+    es5-ext "^0.10.9"
+
 dashdash@^1.12.0:
   version "1.14.1"
   resolved "https://registry.yarnpkg.com/dashdash/-/dashdash-1.14.1.tgz#853cfa0f7cbe2fed5de20326b8dd581035f6e2f0"
@@ -816,13 +856,21 @@ debounce@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/debounce/-/debounce-1.1.0.tgz#6a1a4ee2a9dc4b7c24bb012558dbcdb05b37f408"
 
+debug-fabulous@1.X:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/debug-fabulous/-/debug-fabulous-1.0.0.tgz#57f6648646097b1b0849dcda0017362c1ec00f8b"
+  dependencies:
+    debug "3.X"
+    memoizee "0.4.X"
+    object-assign "4.X"
+
 debug@2.2.0:
   version "2.2.0"
   resolved "https://registry.yarnpkg.com/debug/-/debug-2.2.0.tgz#f87057e995b1a1f6ae6a4960664137bc56f039da"
   dependencies:
     ms "0.7.1"
 
-debug@3.1.0:
+debug@3.1.0, debug@3.X:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/debug/-/debug-3.1.0.tgz#5bb5a0672628b64149566ba16819e61518c67261"
   dependencies:
@@ -929,6 +977,10 @@ detect-libc@^1.0.2:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/detect-libc/-/detect-libc-1.0.3.tgz#fa137c4bd698edf55cd5cd02ac559f91a4c4ba9b"
 
+detect-newline@2.X:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/detect-newline/-/detect-newline-2.1.0.tgz#f41f1c10be4b00e87b5f13da680759f2c5bfd3e2"
+
 diff-match-patch@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/diff-match-patch/-/diff-match-patch-1.0.0.tgz#1cc3c83a490d67f95d91e39f6ad1f2e086b63048"
@@ -1006,6 +1058,37 @@ error-ex@^1.2.0:
   dependencies:
     is-arrayish "^0.2.1"
 
+es5-ext@^0.10.14, es5-ext@^0.10.30, es5-ext@^0.10.35, es5-ext@^0.10.9, es5-ext@~0.10.14, es5-ext@~0.10.2:
+  version "0.10.40"
+  resolved "https://registry.yarnpkg.com/es5-ext/-/es5-ext-0.10.40.tgz#ab3d2179b943008c5e9ef241beb25ef41424c774"
+  dependencies:
+    es6-iterator "~2.0.3"
+    es6-symbol "~3.1.1"
+
+es6-iterator@^2.0.1, es6-iterator@~2.0.3:
+  version "2.0.3"
+  resolved "https://registry.yarnpkg.com/es6-iterator/-/es6-iterator-2.0.3.tgz#a7de889141a05a94b0854403b2d0a0fbfa98f3b7"
+  dependencies:
+    d "1"
+    es5-ext "^0.10.35"
+    es6-symbol "^3.1.1"
+
+es6-symbol@^3.1.1, es6-symbol@~3.1.1:
+  version "3.1.1"
+  resolved "https://registry.yarnpkg.com/es6-symbol/-/es6-symbol-3.1.1.tgz#bf00ef4fdab6ba1b46ecb7b629b4c7ed5715cc77"
+  dependencies:
+    d "1"
+    es5-ext "~0.10.14"
+
+es6-weak-map@^2.0.2:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/es6-weak-map/-/es6-weak-map-2.0.2.tgz#5e3ab32251ffd1538a1f8e5ffa1357772f92d96f"
+  dependencies:
+    d "1"
+    es5-ext "^0.10.14"
+    es6-iterator "^2.0.1"
+    es6-symbol "^3.1.1"
+
 escape-string-regexp@1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/escape-string-regexp/-/escape-string-regexp-1.0.2.tgz#4dbc2fe674e71949caf3fb2695ce7f2dc1d9a8d1"
@@ -1045,6 +1128,13 @@ esutils@^2.0.2:
   version "2.0.2"
   resolved "https://registry.yarnpkg.com/esutils/-/esutils-2.0.2.tgz#0abf4f1caa5bcb1f7a9d8acc6dea4faaa04bac9b"
 
+event-emitter@^0.3.5:
+  version "0.3.5"
+  resolved "https://registry.yarnpkg.com/event-emitter/-/event-emitter-0.3.5.tgz#df8c69eef1647923c7157b9ce83840610b02cc39"
+  dependencies:
+    d "1"
+    es5-ext "~0.10.14"
+
 event-stream@^3.3.1, event-stream@^3.3.4, event-stream@~3.3.4:
   version "3.3.4"
   resolved "https://registry.yarnpkg.com/event-stream/-/event-stream-3.3.4.tgz#4ab4c9a0f5a54db9338b4c34d86bfce8f4b35571"
@@ -1524,16 +1614,16 @@ glogg@^1.0.0:
   dependencies:
     sparkles "^1.0.0"
 
+graceful-fs@4.X, graceful-fs@^4.0.0, graceful-fs@^4.1.2, graceful-fs@^4.1.6:
+  version "4.1.11"
+  resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.1.11.tgz#0e8bdfe4d1ddb8854d64e04ea7c00e2a026e5658"
+
 graceful-fs@^3.0.0:
   version "3.0.11"
   resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-3.0.11.tgz#7613c778a1afea62f25c630a086d7f3acbbdd818"
   dependencies:
     natives "^1.1.0"
 
-graceful-fs@^4.0.0, graceful-fs@^4.1.2, graceful-fs@^4.1.6:
-  version "4.1.11"
-  resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.1.11.tgz#0e8bdfe4d1ddb8854d64e04ea7c00e2a026e5658"
-
 graceful-fs@~1.2.0:
   version "1.2.3"
   resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-1.2.3.tgz#15a4806a57547cb2d2dbf27f42e89a8c3451b364"
@@ -1617,6 +1707,22 @@ gulp-sourcemaps@1.6.0:
     through2 "^2.0.0"
     vinyl "^1.0.0"
 
+gulp-sourcemaps@^2.6.4:
+  version "2.6.4"
+  resolved "https://registry.yarnpkg.com/gulp-sourcemaps/-/gulp-sourcemaps-2.6.4.tgz#cbb2008450b1bcce6cd23bf98337be751bf6e30a"
+  dependencies:
+    "@gulp-sourcemaps/identity-map" "1.X"
+    "@gulp-sourcemaps/map-sources" "1.X"
+    acorn "5.X"
+    convert-source-map "1.X"
+    css "2.X"
+    debug-fabulous "1.X"
+    detect-newline "2.X"
+    graceful-fs "4.X"
+    source-map "~0.6.0"
+    strip-bom-string "1.X"
+    through2 "2.X"
+
 gulp-symdest@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/gulp-symdest/-/gulp-symdest-1.1.0.tgz#c165320732d192ce56fd94271ffa123234bf2ae0"
@@ -2147,6 +2253,10 @@ is-primitive@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/is-primitive/-/is-primitive-2.0.0.tgz#207bab91638499c07b2adf240a41a87210034575"
 
+is-promise@^2.1:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/is-promise/-/is-promise-2.1.0.tgz#79a2a9ece7f096e80f36d2b2f3bc16c1ff4bf3fa"
+
 is-property@^1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/is-property/-/is-property-1.0.2.tgz#57fe1c4e48474edd65b09911f26b1cd4095dda84"
@@ -2669,6 +2779,12 @@ lru-cache@^4.1.1:
     pseudomap "^1.0.2"
     yallist "^2.1.2"
 
+lru-queue@0.1:
+  version "0.1.0"
+  resolved "https://registry.yarnpkg.com/lru-queue/-/lru-queue-0.1.0.tgz#2738bd9f0d3cf4f84490c5736c48699ac632cda3"
+  dependencies:
+    es5-ext "~0.10.2"
+
 make-iterator@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/make-iterator/-/make-iterator-1.0.0.tgz#57bef5dc85d23923ba23767324d8e8f8f3d9694b"
@@ -2708,6 +2824,19 @@ md5@^2.2.1:
     crypt "~0.0.1"
     is-buffer "~1.1.1"
 
+memoizee@0.4.X:
+  version "0.4.12"
+  resolved "https://registry.yarnpkg.com/memoizee/-/memoizee-0.4.12.tgz#780e99a219c50c549be6d0fc61765080975c58fb"
+  dependencies:
+    d "1"
+    es5-ext "^0.10.30"
+    es6-weak-map "^2.0.2"
+    event-emitter "^0.3.5"
+    is-promise "^2.1"
+    lru-queue "0.1"
+    next-tick "1"
+    timers-ext "^0.1.2"
+
 meow@^3.3.0:
   version "3.7.0"
   resolved "https://registry.yarnpkg.com/meow/-/meow-3.7.0.tgz#72cb668b425228290abbfa856892587308a801fb"
@@ -2919,6 +3048,10 @@ natives@^1.1.0:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/natives/-/natives-1.1.1.tgz#011acce1f7cbd87f7ba6b3093d6cd9392be1c574"
 
+next-tick@1:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/next-tick/-/next-tick-1.0.0.tgz#ca86d1fe8828169b0120208e3dc8424b9db8342c"
+
 node-pre-gyp@^0.6.39:
   version "0.6.39"
   resolved "https://registry.yarnpkg.com/node-pre-gyp/-/node-pre-gyp-0.6.39.tgz#c00e96860b23c0e1420ac7befc5044e1d78d8649"
@@ -2967,7 +3100,7 @@ normalize-path@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/normalize-path/-/normalize-path-1.0.0.tgz#32d0e472f91ff345701c15a8311018d3b0a90379"
 
-normalize-path@^2.0.0, normalize-path@^2.0.1:
+normalize-path@^2.0.0, normalize-path@^2.0.1, normalize-path@^2.1.1:
   version "2.1.1"
   resolved "https://registry.yarnpkg.com/normalize-path/-/normalize-path-2.1.1.tgz#1ab28b556e198363a8c1a6f7e6fa20137fe6aed9"
   dependencies:
@@ -2990,14 +3123,14 @@ oauth-sign@~0.8.1, oauth-sign@~0.8.2:
   version "0.8.2"
   resolved "https://registry.yarnpkg.com/oauth-sign/-/oauth-sign-0.8.2.tgz#46a6ab7f0aead8deae9ec0565780b7d4efeb9d43"
 
+object-assign@4.X, object-assign@^4.0.0, object-assign@^4.0.1, object-assign@^4.1.0:
+  version "4.1.1"
+  resolved "https://registry.yarnpkg.com/object-assign/-/object-assign-4.1.1.tgz#2109adc7965887cfc05cbbd442cac8bfbb360863"
+
 object-assign@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/object-assign/-/object-assign-3.0.0.tgz#9bedd5ca0897949bca47e7ff408062d549f587f2"
 
-object-assign@^4.0.0, object-assign@^4.0.1, object-assign@^4.1.0:
-  version "4.1.1"
-  resolved "https://registry.yarnpkg.com/object-assign/-/object-assign-4.1.1.tgz#2109adc7965887cfc05cbbd442cac8bfbb360863"
-
 object-copy@^0.1.0:
   version "0.1.0"
   resolved "https://registry.yarnpkg.com/object-copy/-/object-copy-0.1.0.tgz#7e7d858b781bd7c991a41ba975ed3812754e998c"
@@ -3559,7 +3692,7 @@ resolve-dir@^1.0.0, resolve-dir@^1.0.1:
     expand-tilde "^2.0.0"
     global-modules "^1.0.0"
 
-resolve-url@^0.2.1:
+resolve-url@^0.2.1, resolve-url@~0.2.1:
   version "0.2.1"
   resolved "https://registry.yarnpkg.com/resolve-url/-/resolve-url-0.2.1.tgz#2c637fe77c893afd2a663fe21aa9080068e2052a"
 
@@ -3723,6 +3856,15 @@ sntp@2.x.x:
   dependencies:
     hoek "4.x.x"
 
+source-map-resolve@^0.3.0:
+  version "0.3.1"
+  resolved "https://registry.yarnpkg.com/source-map-resolve/-/source-map-resolve-0.3.1.tgz#610f6122a445b8dd51535a2a71b783dfc1248761"
+  dependencies:
+    atob "~1.1.0"
+    resolve-url "~0.2.1"
+    source-map-url "~0.3.0"
+    urix "~0.1.0"
+
 source-map-resolve@^0.5.0:
   version "0.5.1"
   resolved "https://registry.yarnpkg.com/source-map-resolve/-/source-map-resolve-0.5.1.tgz#7ad0f593f2281598e854df80f19aae4b92d7a11a"
@@ -3743,10 +3885,20 @@ source-map-url@^0.4.0:
   version "0.4.0"
   resolved "https://registry.yarnpkg.com/source-map-url/-/source-map-url-0.4.0.tgz#3e935d7ddd73631b97659956d55128e87b5084a3"
 
-source-map@>=0.5.6, source-map@^0.6.0:
+source-map-url@~0.3.0:
+  version "0.3.0"
+  resolved "https://registry.yarnpkg.com/source-map-url/-/source-map-url-0.3.0.tgz#7ecaf13b57bcd09da8a40c5d269db33799d4aaf9"
+
+source-map@>=0.5.6, source-map@^0.6.0, source-map@~0.6.0:
   version "0.6.1"
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.6.1.tgz#74722af32e9614e9c287a8d0bbde48b5e2f1a263"
 
+source-map@^0.1.38:
+  version "0.1.43"
+  resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.1.43.tgz#c24bc146ca517c1471f5dacbe2571b2b7f9e3346"
+  dependencies:
+    amdefine ">=0.0.4"
+
 source-map@^0.4.4:
   version "0.4.4"
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.4.4.tgz#eba4f5da9c0dc999de68032d8b4f76173652036b"
@@ -3894,6 +4046,10 @@ strip-bom-stream@^2.0.0:
     first-chunk-stream "^2.0.0"
     strip-bom "^2.0.0"
 
+strip-bom-string@1.X:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/strip-bom-string/-/strip-bom-string-1.0.0.tgz#e5211e9224369fbb81d633a2f00044dc8cedad92"
+
 strip-bom@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/strip-bom/-/strip-bom-1.0.0.tgz#85b8862f3844b5a6d5ec8467a93598173a36f794"
@@ -3998,6 +4154,13 @@ through2@2.0.1:
     readable-stream "~2.0.0"
     xtend "~4.0.0"
 
+through2@2.X, through2@^2.0.0, through2@^2.0.1, through2@^2.0.3, through2@~2.0.0, through2@~2.0.1, through2@~2.0.3:
+  version "2.0.3"
+  resolved "https://registry.yarnpkg.com/through2/-/through2-2.0.3.tgz#0004569b37c7c74ba39c43f3ced78d1ad94140be"
+  dependencies:
+    readable-stream "^2.1.5"
+    xtend "~4.0.1"
+
 through2@^0.5.0, through2@~0.5.0:
   version "0.5.1"
   resolved "https://registry.yarnpkg.com/through2/-/through2-0.5.1.tgz#dfdd012eb9c700e2323fd334f38ac622ab372da7"
@@ -4012,13 +4175,6 @@ through2@^0.6.0, through2@^0.6.1, through2@~0.6.5:
     readable-stream ">=1.0.33-1 <1.1.0-0"
     xtend ">=4.0.0 <4.1.0-0"
 
-through2@^2.0.0, through2@^2.0.1, through2@^2.0.3, through2@~2.0.0, through2@~2.0.1, through2@~2.0.3:
-  version "2.0.3"
-  resolved "https://registry.yarnpkg.com/through2/-/through2-2.0.3.tgz#0004569b37c7c74ba39c43f3ced78d1ad94140be"
-  dependencies:
-    readable-stream "^2.1.5"
-    xtend "~4.0.1"
-
 through@2, "through@>=2.2.7 <3", through@~2.3, through@~2.3.1:
   version "2.3.8"
   resolved "https://registry.yarnpkg.com/through/-/through-2.3.8.tgz#0dd4c9ffaabc357960b1b724115d7e0e86a2e1f5"
@@ -4033,6 +4189,13 @@ time-stamp@^1.0.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/time-stamp/-/time-stamp-1.1.0.tgz#764a5a11af50561921b133f3b44e618687e0f5c3"
 
+timers-ext@^0.1.2:
+  version "0.1.4"
+  resolved "https://registry.yarnpkg.com/timers-ext/-/timers-ext-0.1.4.tgz#365781e62b458722be079379fdbfe610a5efa4ba"
+  dependencies:
+    es5-ext "~0.10.14"
+    next-tick "1"
+
 tmp@0.0.29:
   version "0.0.29"
   resolved "https://registry.yarnpkg.com/tmp/-/tmp-0.0.29.tgz#f25125ff0dd9da3ccb0c2dd371ee1288bb9128c0"
@@ -4243,7 +4406,7 @@ untildify@^3.0.2:
   version "3.0.2"
   resolved "https://registry.yarnpkg.com/untildify/-/untildify-3.0.2.tgz#7f1f302055b3fea0f3e81dc78eb36766cb65e3f1"
 
-urix@^0.1.0:
+urix@^0.1.0, urix@~0.1.0:
   version "0.1.0"
   resolved "https://registry.yarnpkg.com/urix/-/urix-0.1.0.tgz#da937f7a62e21fec1fd18d49b35c2935067a6c72"