update encoding of plus sign. many dependency bumps.

quick release to fix packaging metadata

type hints and URL internal state consistency

do not escape equal signs in query parameter values, and allow query …

…parameter removal by value

DecodedURL, parse, query-params-as-dict, proper modern idna, mixed pe…

…rcent decoding, and normalizing stray percents in percent-encoded fields

add URL.normalize() method and allow URL.click() to accept URL objects

remove 'family', fix percent decoding and to_iri() issues, limit URL.…

…from_text to only text types, and include LICENSE, etc. in tarball

a small bugfix release. reverts exception message for parameters expe…

…cting strings on Python 3.

fixed a great round of issues based on the amazing community review (@…

…wsanchez and @jvanasco) after our first announcement

slight update to behavior with empty paths to be more in line with RF…

…C 3986 section 6.2.3, also bringing hyperlink back into compliance with legacy Twisted test suite. Most other commits since last release are related to the LICENSE, CI, and code coverage as a service