fix: display errors

[ricardogobbosouza]

Fix #214

This PR contains a:

• bugfix
• new feature
• code refactor
• test update
• typo fix
• metadata update

Motivation / Use-Case

I was doing a simple check, whether the file was in error or not.
Now I go through all the warnings and see if there are any error.

This fixes the issue with the options:

• reportNeedlessDisables
• reportInvalidScopeDisables
• reportDescriptionlessDisables

This options above do not mark the file with error, but that launch warnings with error.

[codecov]

Codecov Report

Merging #237 (4a6742e) into master (620ac1d) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master      #237   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            8         8           
  Lines          227       221    -6     
  Branches        52        49    -3     
=========================================
- Hits           227       221    -6     

Impacted Files	Coverage Δ
src/linter.js	100.00% <100.00%> (ø)

---

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 620ac1d...4a6742e. Read the comment docs.