Improve dev setup

[kachkaev]

• Cleanup ignore files
• Improve Jest config (change coverage reporter)
• Improve ESLint config

[codecov]

Codecov Report

Base: 92.63% // Head: 94.68% // Increases project coverage by +2.04% 🎉

Coverage data is based on head (f8dc92f) compared to base (63a4cf5).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #34      +/-   ##
==========================================
+ Coverage   92.63%   94.68%   +2.04%     
==========================================
  Files           5        5              
  Lines          95       94       -1     
  Branches       13       14       +1     
==========================================
+ Hits           88       89       +1     
+ Misses          6        4       -2     
  Partials        1        1              

Impacted Files	Coverage Δ
src/printer.ts	100.00% <ø> (ø)
src/parser.ts	88.23% <0.00%> (+0.73%)	⬆️
src/index.ts	75.00% <0.00%> (+15.00%)	⬆️

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

☔ View full report at Codecov.
📢 Do you have feedback about the report comment? Let us know in this issue.