feat: remove chalk to support browsers

[frederickfogerty]

From #139

What

Removes dependency on chalk. Right now the call to red has been removed. There is potential to run different code for this based on the platform, using a technique such as this, but I'm not sure how stable/supported this technique is.

Why

Chalk does not work in the browser. As Jest is moving to support browsers, it is important that jest-extended can work in browser as well.

Housekeeping

• Unit tests
• Documentation is up to date
• No additional lint warnings
• Add yourself to contributors list (yarn contributor)
• Typescript definitions are added/updated where relevant

[codecov-io]

Codecov Report

Merging #140 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff          @@
##           master   #140   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files          90     90           
  Lines         425    425           
  Branches       70     70           
=====================================
  Hits          425    425

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[mattphillips]

Thanks @frederickfogerty given how little chalk was used this is a sensible change 👍