use eslint with stylistic for tidying javascript

[haarg]

eslint and stylistic is more configurable than prettier and can have better alignment. We are also already using eslint.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 73.61%. Comparing base (e59beb0) to head (1bcb6d8).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3460      +/-   ##
==========================================
- Coverage   73.63%   73.61%   -0.02%     
==========================================
  Files          67       67              
  Lines        2355     2354       -1     
  Branches      333      333              
==========================================
- Hits         1734     1733       -1     
  Misses        497      497              
  Partials      124      124              

Files with missing lines	Coverage Δ
lib/MetaCPAN/Web/Controller/Feed.pm	89.56% <100.00%> (-0.09%)	⬇️

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.