release_2.0.0.dev5

API Changes

• Use isort v5.x as the default version (#10258)
• Don't register any options as recursive. (#10415)

New Features

• Speed up repl to no longer rebuild a Pex on source
  file changes (#10418)

Refactoring, Improvements, and Tooling

• Implement cycle detection in transitive_targets, and tolerate cycles
  in file-addresses. (#10409)
• Stop using cargo-ensure-installed (#10400)
• Remove use of "quiet" in logging init (#10417)

Testing

• Port the plugin resolver test to v2 test style. (#10424)
• Refactor flake8 integration test to use create_options_bootstrapper
  (#10422)
• Increase timeout on project_info tests. (#10421)