Bump hyperlink from 19.0.0 to 21.0.0

[dependabot-preview[bot]]

Bumps hyperlink from 19.0.0 to 21.0.0.

Changelog

Sourced from hyperlink's changelog.

21.0.0

(January 7, 2021)

• Update plus sign (+) handling to work with/like HTML form encoding (POST) by default, fixes #129i129, and associated roundtripping (#146i146).
• Package IDNA tables. (#134i134)
• Long overdue dependency bumps

20.0.1

(August 4, 2020)

Rerelease to fix packaging metadata around conditional requirements. See [issue #133](python-hyper/hyperlink#133) for more details.

20.0.0

(August 3, 2020)

• CPython 3.7 and 3.8 and PyPy3 added to test matrix
• Hyperlink now has type hints and they are now exported per PEP 561.
• Several bugs related to hidden state were fixed, making it so that all data on a URL object (including rooted and uses_netloc) is reflected by and consistent with its textual representation. This does mean that sometimes these constructor arguments are ignored, if it would create invalid or unparseable URL text.

Commits

• eae9223 bump version for v21.0.0 release (and add py3.9 classifier)
• 272fede Merge pull request #150 from python-hyper/requires-io-master
• 39b1912 [requires.io] dependency update
• 512b464 Merge pull request #148 from python-hyper/requires-io-master
• cdfe3c8 [requires.io] dependency update
• 31f37e2 [requires.io] dependency update
• 4533c5a [requires.io] dependency update
• 4d7f643 [requires.io] dependency update
• 1949b07 Merge pull request #145 from python-hyper/ne-plus-ultra
• b06994b Merge pull request #146 from twm/ne-plus-ultra
• Additional commits viewable in compare view

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