Stop overriding ColoredLineFormatter format

See merge request !7

Upgrade phpunit config

See merge request !6

Declare coworker context as part of env

See merge request !8

General composer update

See merge request !5

Per #13 the default provides more information
which turns out to matter

* Fix conflict with CMS PharInterceptors. Preload key PHP files before CMS loads.
* Change `*BUILTIN*` to `MINIPIPE`. Allow negotiation flags.
* Update docs

Cleanup option names

See merge request !4