Update go.mod

Update go.mod

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

CSS: fix minify to initial/auto/none for flex, fixes tdewolff#398

CSS: unicode-range minification, fixes tdewolff#321 and closes tdewol…

…ff#344

HTML: keep space after empty <i></i>, fixes tdewolff#390

Update to tdewolff/parse@2.5.10

Update dependencies

Update tdewolff/parse to v2.5.8

JS: fix removal of parenthesis around comma expressions left of AND o…

…perator, fixes tdewolff#347