Changelog:
==========
- Fixed joining a path when the existing path was empty
- Added :meth:URL.without_query_params() <yarl.URL.without_query_params> method,
to drop some parameters from query string
- The previously protected types _SimpleQuery, _QueryVariable, and _Query are
now available for use externally as SimpleQuery, QueryVariable, and Query
- Replaced all :class:~typing.Optional with :class:~typing.Union
- Significantly improved performance of parsing the network location
- Added internal types to the cache to prevent future refactoring errors
Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
