v2.12.6
- SVG: keep empty attributes; fixes #576
- JS: use literal NULL instead of escaped zero in strings, fixes #577
- JS: fix parsing of string expressions at the start of statement lists that are no UseStrictDirectives
- JS: decode unicode escape sequences in strings to UTF-8 literals
- JS: fix unicode string escape when not a valid UTF-8 character
- HTML: do not convert lang attribute value to lower #579
- JS: fix race condition for ECMAScript version and remove deprecated NoNullishOperator (use Version instead), fixes https://github.com/tdewolff/minify/issues/582