(#27) Colored output

[llorllale]

PR for #27:

• Implemented colored output
• Also, issues.Collected() now collects all issues of a commit, not just the first one encountered.

[codecov]

Codecov Report

Merging #29 into master will decrease coverage by 1.91%.
The diff coverage is 77.77%.

@@            Coverage Diff             @@
##           master      #29      +/-   ##
==========================================
- Coverage   87.62%   85.71%   -1.92%     
==========================================
  Files           4        4              
  Lines          97       98       +1     
==========================================
- Hits           85       84       -1     
- Misses          6        7       +1     
- Partials        6        7       +1

Impacted Files	Coverage Δ
internal/commits/commits.go	87.87% <100%> (+0.78%)	⬆️
internal/issues/filters.go	89.74% <100%> (ø)	⬆️
internal/issues/issues.go	80% <66.66%> (-10.48%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 1804526...7dd4daa. Read the comment docs.