v3.5.16

Enhancements:

• Installs bundler 2.5.16 as a default gem.

Bug fixes:

• Fix gemspec require_paths validation. Pull request
  #7866 by
  deivid-rodriguez
• Fix loading of nested gemrc config keys when specified as symbols.
  Pull request #7851 by
  moofkit

Performance:

• Use caller_locations instead of splitting caller. Pull request
  #7708 by nobu