- update to 3.6.5:
* Fix extend edge case going endlessly
* Fix source-maps and how we count unicode characters
* Fix seed generator if std::random_device fails
* Fix url() containing exclamation mark causing an error
* Fix Offset initialization when end was not given
* Fix obvious backporting error in pseudo extend
* Fix obvious identical subexpressions in op_color_number
* Fix edge case regarding unit-less number equality as object keys
* Revert compound re-ordering for non extended selectors
* Prevent compiler warning about unnecessary copy