fix: check result object

[ricardogobbosouza]

This PR contains a:

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

Motivation / Use-Case

Resolve #306

Breaking Changes

Additional Info

[codecov]

Codecov Report

Merging #311 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master   #311   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           7      7           
  Lines         137    148   +11     
  Branches       29     40   +11     
=====================================
+ Hits          137    148   +11

Impacted Files	Coverage Δ
src/Linter.js	100% <100%> (ø)	⬆️

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