Consider upgrading to simdjson 0.2.0 #11

The library simdjson has a new major release (0.2.0). Major changes:

• Support for 64-bit ARM processors, can run under iOS (iPhone).
• Runtime dispatching on x64 processors (switches to SSE on older x64 processors, uses AVX2 when available). Supports processors as far back as the Intel Westmere.
• More accurate number parsing.
• Fixes most warnings under Visual Studio.
• Several small bugs have been fixed.
• Better performance in some cases.
• Introduces a JSON Pointer interface https://tools.ietf.org/html/rfc6901
• Better and more specific error messages (with optional textual descriptions).
• valgrind clean.
• Unified code style (LLVM).