Allow complete control over stdio (#17)

* Add results of stdio tests

* Add ipc tests

* Allow complete control over stdio

* Add more debug info to test failure

* Rename extension to ps1

Sync sync usage of `parsed.options` in async usage

Fix ENOENT 127 code; stop forever block on ENOENT; cleanup (#15)

* Reference CP functions via module alias

* Convert ENOENT to 127; don't block forever

* Define processFinishedFiber more locally

* Define timeout refs more locally

* Use simpler kill

* Start processFinished as fiber then join later

* Define mkStdIoFiber more locally

* Add type sig to mainFiber

* Bump node to lts

Update `node-event-emitter` to v3.0.0; expose ChildProcess events as …

…`EventHandle`s (#10)

* Update event-emitter to v3.0.0

* Re-expose child process events via EventHandle

Fix Windows case-sensitive env values; remove unused code; fix sheban…

…gCommand (#9)

* Windows env is case-sensitive

* Drop unused args from CrossSpawn

* Fix windows case-sensitivity in env lookup

* Add macos and windows to CI

* Drop sleep unit; breaks mac

* Remove SpecT

* Add tests for Windows

* Add shebang command tests; fix code

Store result of stderr, not stdout, in result.stderr (#6)

Drop wrapping quotes; parse any escaped char (#5)

Add copyright notice to lib's ported code file

Drop unused imports

Add helpers for piping to parent process