feat: add basic reporter

[jhnns]

Based on #66

[codecov-io]

Codecov Report

Merging #78 into master will increase coverage by 0.06%.
The diff coverage is 98.63%.

@@            Coverage Diff             @@
##           master      #78      +/-   ##
==========================================
+ Coverage   97.89%   97.95%   +0.06%     
==========================================
  Files          36       37       +1     
  Lines         712      784      +72     
  Branches      139      153      +14     
==========================================
+ Hits          697      768      +71     
- Misses         15       16       +1

Impacted Files	Coverage Δ
src/reporters/index.js	100% <100%> (ø)	⬆️
src/reporters/basic.js	98.61% <98.61%> (ø)

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