Update html-minifier to version 1.3.1 🚀

[greenkeeperio-bot]

Hello 👋

🚀🚀🚀

html-minifier just published its new version 1.3.1, which is not covered by your current version range.

If this pull request passes your tests you can publish your software with the latest version of html-minifier – otherwise use this branch to work on adaptions and fixes.

Happy fixing and merging 🌴

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The new version differs by 136 commits .

• 057b9f8 Version 1.3.1
• 673ee7b update devDependencies
• f7894c2 update devDependencies
• d767ac9 Merge pull request #566 from alexlamsl/phrasing-rewrite
• c89ba3d </br> transforms into <br>
• c9088f6 unpaired </p> gets auto-filled by major browsers
• db7a32c make phrasing content handling consistent with IE 11 & Chrome 48
• 69034a7 Merge pull request #567 from alexlamsl/conditional-parsing
• f981e97 update README
• 76624d5 control flag for conditional comments minification
• bbffbc1 Merge pull request #571 from alexlamsl/inline-empty-content-whitespace
• d90c81f treat empty inline tags as text
• 932cb14 Merge pull request #574 from alexlamsl/issue-572
• 13130d7 move chunk index within comment
• e74f603 Merge pull request #568 from oliviertassinari/fix-webpack

There are 136 commits in total. See the full diff.

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This change is

[codecov-io]

Current coverage is 86.54%

Merging #569 into master will not affect coverage as of 7716520

@@            master    #569   diff @@
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  Files           97      97       
  Stmts          847     847       
  Branches         0       0       
  Methods          0       0       
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  Hit            733     733       
  Partial          0       0       
  Missed         114     114       

Review entire Coverage Diff as of 7716520

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