Bump ex_doc from 0.19.1 to 0.21.2 - #11

Sourced from ex_doc's changelog.

v0.21.2

• Enhancements

  • [HTML] Add hardcoded packages to the quick-switch search results
  • [HTML] Filter out packages without docs on HexDocs in quick-switch
  • [HTML+EPUB] Support autolinking for multiple arities
  • [mix docs] Avoid deprecation warnings on more recent earmark versions
  • [mix docs] Warn on unavailable local functions
  • [mix docs] Make invalid index redirect warning case-sensitive
  • [mix docs] Ignore non-Elixir modules when missing chunk

• Bug fixes

  • [HTML+EPUB] Do not create a custom link when destination does not exist
  • [EPUB] Hide screen reader elements

v0.21.1

• Bug fixes
  • [HTML] Make sure package selector can be reopened after closed with ESC
  • [HTML] Ensure tooltip pages can be cached
  • [HTML] Support large version numbers on the version dropdown
  • [mix docs] Raise nice exception for missing ExDoc.Config

v0.21.0

• Enhancements

  • [HTML] Add support for reference popovers
  • [HTML] Provide a "g" shortcut to Go To a Hexdocs package (with autocomplete)
  • [HTML] Detect if browser prefers night mode
  • [EPUB] Add support for covers and the authors field

• Bug fixes

  • [HTML+EPUB] Ensure that link headers generate unique IDs
  • [HTML+EPUB] Sort structs fields so field names are always ordered
  • [HTML+EPUB] Do not strip "Elixir." prefix from module names
  • [HTML] Support URLs with non-HTML safe characters
  • [EPUB] Fix table of contents without groups

v0.20.2

• Enhancements

  • Add "mix " prefix to Mix tasks

• Bug fixes

  • Improve scrolling on Safari
  • Prevent text casing of codes
  • Do not remove stop words from search and make sure function names are searchable in isolation
  • Reduce the size of the search metadata
  • Remove outline on focus and keep width in version dropdown
  • Do not fail if we can't persist index

... (truncated)

• e359b0d Release v0.21.2
• f45866c fully document :source_url_pattern (#1086)
• 9714940 Update README.md
• a17360f Readme: Add link to main configuration listing (#1082)
• 29b161e Support autolinking for multiple arities (#1080)
• 81db137 Ignore non-Elixir modules when missing chunk
• 24d9783 Only check for module loaded after getting docs chunk
• ac0f1d2 Make index redirect warning case-sensitive (#1077)
• 2667bbc (fix): Run tests that require a GUI with xvfb
• e9e261b (epub): Avoid duplicate IDs on Package Definition
• Additional commits viewable in compare view

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