v3.5.19

Enhancements:

• Standardize pretty-print output for Gem::Source and subclasses. Pull
  request #7994 by
  djberube
• Update vendored molinillo to master and vendored resolv to 0.4.0.
  Pull request #7521 by
  hsbt
• Installs bundler 2.5.19 as a default gem.

Bug fixes:

• Fix bundle exec rake install failing when local gem has extensions.
  Pull request #7977 by
  deivid-rodriguez
• Make gem exec use the standard GEM_HOME. Pull request
  #7982 by
  deivid-rodriguez
• Fix gem fetch always exiting with zero status code. Pull request
  #8007 by
  deivid-rodriguez
• Remove temporary .lock files unintentionally left around by gem
  installer. Pull request
  #7939 by nobu
• Removed unused stringio. Pull request
  #8001 by hsbt
• Avoid another race condition of open mode. Pull request
  #7931 by nobu
• Fix @license typo preventing licenses from being correctly
  unmarshalled. Pull request
  #7975 by djberube

Performance:

• Fix gem install does-not-exist being super slow. Pull request
  #8006 by
  deivid-rodriguez