Fix test

JS: change character order for JS variable renaming of 2 or more char…

…acters, improves GZIP compression

Fix bug

HTML: fix attribute quoting bugs

Merge branch 'master' of github.com:tdewolff/minify

Merge branch 'master' of github.com:tdewolff/minify

JS: fix merging of assignments with let/const declarations, fixes tde…

…wolff#474

Update to tdewolff/parse@2.5.28

JS: revert the reversal of <,<=, fixes tdewolff#462

Update readme