fixed error in finding closing tag
Removed unnecessary parameter
Improved detecting whether the pointer is in a string or not
Remove Javascript inline comments + improved detecting whether the pointer is in a string or not
Fixed coding style
Add support for UPDATE ... RETURNING statements in PostgreSQL

An improved version of PR #2629.
Also removes REPLACE from the regular expression, as it is not supported by PostgreSQL.
Really fix #2490, rel: #2629
Fixed coding style
Merge pull request #2631 from mjnaderi/develop

Fixed errors in _minify_script_style