Update html-minifier to 4.0.0

[oscarmarcelo]

Among other issues, the current dependency version has an issue with attributes without quotes when the value is a PHP expression, which appends trailing spaces, breaking attributes that expect numbers.

[rodrigograca31]

We should actually move to html-minifier-terser https://www.npmjs.com/package/html-minifier-terser

Because as stated here html-minifier uses:

uglify-es is no longer maintained and uglify-js does not support ES6+.

kangax/html-minifier#1040

[rodrigograca31]

ping @jonschlinkert
we should move to html-minifier-terser right........?

[jonschlinkert]

Why?

…

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On Feb 6, 2020, at 6:47 AM, Rodrigo Graça ***@***.***> wrote: ping @jonschlinkert we should move to html-minifier-terser right........? — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub, or unsubscribe.

[rodrigograca31]

Then just let this project die? 😢

I still use it... and many other according to npm stats:
https://www.npmjs.com/package/gulp-htmlmin