Log Message:
misc/ruby-bundler: update to 2.3.21

For changes before 2.3.18, please refer:
<https://github.com/rubygems/rubygems/releases>.

2.3.20 (2022-08-10)

Enhancements:
* Consistently ignore patchlevel when reporting bundle platform --ruby #5793
* Make --standalone play nice with --local #5762
* Implement bundle install --prefer-local #5761

Bug fixes:

* Fix regression where yanked gems are now unintentionally updated when
  other gems are unlocked #5812
* Automatically remove "ruby" from lockfile if incomplete #5807
* Fix bundle outdated --strict showing too many outdated gems #5798
* Don't discard candidates matching Ruby metadata #5784
* Fix bundle outdated crash in debug mode #5796
* Fix ruby DSL requirement matching for head and prerelease rubies #5766

Documentation:
* Update Bundler support policies to match what we do these days #5813
* Fix arguments for bundle-config(1) docs #5804
* Improve bundle platform man page #5788
* Remove bundle cache from deprecated commands list, and consistently link
  to bundle cache in man pages #5783
* Add package/pack aliases to man pages for cache #5785
* Add deprecation notice of bundle console #5775

2.3.21 (2022-08-24)

Enhancements:
* Backport non gnu libc linux support from RubyGems #4488
* Improve Bundler.rm_rf error message #5861
* Disallow both --branch and --ref at the same time in bundle-plugin #5855
* Restore previous performance of private RubyGems servers #5826

Bug fixes:
* Fix conservative update downgrading top level gems #5847
* Fix edge case where bundler/inline unintentionally skips install #5848
* Fix bundle platform crash when there's a lockfile with no Ruby locked
  #5850
* Fix crash when incomplete locked specifications are found in transitive
  dependencies #5840
* Fix Ruby platform incorrectly removed on bundle update #5832

Documentation:
* Explain cancelled CLI deprecations clearly #5864
* Improve bundle config command synopsis #5854
* Introduce bundle-plugin(1) man #5853

2.3.19 (2022-07-27)

Enhancements:
* Add Bundler.settings[:only] to install gems of the specified groups #5759
* Add ignore_funding_requests config flag #5767
* Prevent random crash when autoloading Pathname #5769
* Don't corrupt lockfile when user moves a gem that's already in the
  lockfile to an incorrect source by mistake #5070
* Reconcile error/warning message for multiple global sources with
  documentation #5741
* Improve error message when gems cannot be found to include the source for
  each gem #5729

Bug fixes:
* Fix yet another TruffleRuby platform selection regression #5746
* Show a proper error if extension dir is not writable #5726

Performance:
* Lazily check incomplete lockfile to improve performance #5546

Documentation:
* Add deprecation notice of bundle inject #5776
* Add deprecation notice of bundle viz to man pages #5765
* Update command example in bundle exec man page #5754
* Remove bundle show from obsolete commands #5753
* Improve global source(s) documentation #5732
* Use https protocol for URLs for config mirror in bundler man #5722

2.3.18 (2022-07-14)

Enhancements:
* Extend gem DSL with a force_ruby_platform option #4049

Bug fixes:
* Fix misleading error if compact index cannot be copied #5709
* Fix TruffleRuby no longer able to install lockfiles generated with other
  implementations #5711
* Fix TruffleRuby no longer installing lockfiles using "ruby" platform
  correctly #5694
* Fix crash when updating vendor cache of default gems #5679

Performance:
* Speed up bundler/setup by using the raw Gemfile.lock information without
  extra processing whenever possible #5695

Documentation:
* Use modern style hashes in Gemfile DSL docs #5674