* Update mypy to 1.6.1
* Fix mypy "Source file found twice under different module names" error
* Ignore type of intialized abstract class in tests
* Use more specific type ignore method-assign
* Type ignore for message.get_all
* Remove unused type ignore
* Add SizedBuffer type for xmlrpc.client.Transport subclass
* Add Self type for RequestHandlerClass in test
* Add type ignore for shutil.rmtree onexc handler
* Quote SizedBuffer
* Add news entry
* Remove no longer correct comment
* Update self import
* Also ignore type onerror=handler
* Update news entry
* Update news entry
The pip-specific Path implementation has been removed, and all its
usages replaced by pathlib.Path. The tmpdir and tmpdir_factory fixtures
are also removed, and all usages are replaced by tmp_path and
tmp_path_factory, which use pathlib.Path.
The pip() function now also accepts pathlib.Path so we don't need to put
str() everywhere. Path arguments are coerced with os.fspath() into str.
adds VERBOSE custom log level between DEBUG and INFO
used when `-v` is given. Now require -vv to enable full debug output.
Messages can be logged with VERBOSE level to promote them to `-v` output instead of `-vv`