==================
* Distinguish an empty password in URL from a password not provided at all (262)
* Fixed annotations for optional parameters of ``URL.build`` (309)
* Use None as default value of ``user`` parameter of ``URL.build`` (309)
* Enforce building C Accelerated modules when installing from source tarball, use
``YARL_NO_EXTENSIONS`` environment variable for falling back to (slower) Pure Python
implementation (329)
* Drop Python 3.5 support
* Fix quoting of plus in path by pure python version (339)
* Don't create a new URL if fragment is unchanged (292)
* Included in error msg the path that produces starting slash forbidden error (376)
* Skip slow IDNA encoding for ASCII-only strings (387)