Bump html-proofer from 3.19.4 to 4.2.0

Bumps html-proofer from 3.19.4 to 4.2.0.

Changelog

Sourced from html-proofer's changelog.

Changelog

v4.1.0 (2022-07-15)

Full Changelog

Closed issues:

• Set enforce_https to false on the CLI #727
• hash ref's on the same page aren't found #725
• srcset width/pixel density descriptors cause missing image error #724
• Example cache config not working #723
• Removal of --check-html #722
• CHANGELOG.md says Unreleased but 4.0 is out #721
• Make --checks options case insensitive #720

Merged pull requests:

• Squash some minor 4.x bugs #728 (gjtorikian)
• Change --url-ignore to --ignore-urls in README.md #726 (nwhetsell)

v4.0.1 (2022-07-12)

Full Changelog

Closed issues:

• Linking to directories without a trailing slash in 4.0.0 #718

Merged pull requests:

• Restore follow_location #719 (gjtorikian)

v4.0.0 (2022-07-11)

Full Changelog

Closed issues:

• From time to time I get response code 0 with Stream error in the HTTP/2 framing layer #716
• Hash not exist in path with implicit index #714
• Config section of README seems to be out of sync with actual CLI options #713
• Allow separate internal/external cache timeframe #708
• Update nokogiri dependency #705
• Issue with internal links re-checking logic / cache keys #702
• Empty alt tag #228

Merged pull requests:

• Allow for empty alt attributes #717 (gjtorikian)

... (truncated)

Commits

• a9c58af 💎 bump to 4.2.0 (nice)
• 70c22f6 Merge pull request #732 from gjtorikian/check_internal_hash
• 8f0a6e6 Add option to disable internal hash check
• a6ef9b5 changelog
• 6927073 Merge pull request #729 from bassmang/patch-1
• 54d00d5 Update readme to reflect new command line option --ignore-status-codes
• a6a5d0e 💎 4.1.0
• cd7a457 Merge pull request #728 from gjtorikian/buggies
• 319c193 srcset updates
• 082d317 allow disabling of https on cli
• Additional commits viewable in compare view