feat: add prefer-https rule

[yeonjuan]

fixes #61

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.31%. Comparing base (22325ef) to head (24359e6).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #250      +/-   ##
==========================================
+ Coverage   98.27%   98.31%   +0.04%     
==========================================
  Files          59       60       +1     
  Lines        1623     1665      +42     
  Branches      432      446      +14     
==========================================
+ Hits         1595     1637      +42     
  Misses         28       28              

Flag	Coverage Δ
unittest	98.31% <100.00%> (+0.04%)	⬆️

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Files with missing lines	Coverage Δ
packages/eslint-plugin/lib/rules/index.js	100.00% <100.00%> (ø)
packages/eslint-plugin/lib/rules/prefer-https.js	100.00% <100.00%> (ø)
packages/eslint-plugin/lib/rules/utils/node.js	94.73% <100.00%> (+0.19%)	⬆️