Multiple test files? #66

Light question. Does the current testing infrastructure using tape and c8 support multiple test files, without writing a test runner? e.g. adding test/multiple.js

I have not previously used tape or c8. After some research and experimentation I found this appears to work on Mac, but I am not sure about Windows. (Or whether it is actually doing what I intend! 🤔).

npx c8 tape test/*.js