Bump hyperlink from 17.3.1 to 18.0.0

[dependabot-preview]

Bumps hyperlink from 17.3.1 to 18.0.0.

Changelog

Sourced from hyperlink's changelog.

18.0.0

(February 25, 2018)

Maybe the biggest release since the original. Big thanks to glyph,
wsanchez, Julian, wbolster, and of course, markrwilliams, for all
the reports, reviews, and other contributions.

• When passed to str() URLs now stringify to usable URL
  strings. (See #49)
• Switched off of Python's built-in IDNA facilities to using the
  idna package. Not only is it
  much more modern, it's also much more strict and correct in its
  output. (See #19 and #56)
• Added new DecodedURL type with almost-identical API to the normal
  URL, except that it automatically handles reserved characters in
  argument values passed to its methods. (See #6, #11, #44)
• Added top-level parse() convenience function that now represents
  the main entrypoint to hyperlink.
• Accept dictionaries as ‘query=’ arguments, in addition to
  sequences of tuples (see #50)
• URL.child() will no longer fail when child gets no segments (#42 and #43)
• URL.normalize() now supports encoding stray/unmatched % characters
  in character-encoded fields (userinfo, path, query string, fragment)
  (see #61, #62)

Commits

• 4547ee5 bump docs version to 18.0.0
• 3e22549 bump version for 18.0.0 release
• e3b496f Merge pull request #62 from python-hyper/i61_normalize_stray_percents
• 4cbf71f shorten up encode_stray_percents to just percents, per glyph review
• 8de4016 URL.normalize() docs: add cite, argument doc, remove todo
• 3267c27 add 'encode_stray_percents', a new argument to _percent_decode(), its variant...
• 28c908b Merge pull request #59 from python-hyper/i58_mixed_percent_decoding
• 4dd846d add a couple more tests around mixed percent decoding and fix docstring for _...
• a0cf6d5 remove excessive encode* from DecodedURL now that _percent_decode() support...
• 5d4b542 enable _percent_decode to decode percent encodings within unicode text
• Additional commits viewable in compare view

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[coveralls]

Coverage remained the same at 20.294% when pulling 3cc2ae9 on dependabot/pip/develop/hyperlink-18.0.0 into 6b6185e on develop.

[dependabot-preview]

Looks like hyperlink is no longer a dependency, so this is no longer needed.