v4.3.0

What's Changed

• Fix S3 upload of symlinked artifacts by @GrahamCampbell in #446
• [4.x] Fix YAML parsing of existing stack templates by @GrahamCampbell in #447
• Retry throttled AWS calls after stack deployment by @GrahamCampbell in #449
• [4.x] Add !Transform and !GetStackOutput short forms by @GrahamCampbell in #451
• Jitter framework-level AWS retry delays by @GrahamCampbell in #453

Full Changelog: v4.2.0...v4.3.0