What's Changed

• Lowercase all response headers by @amatsuda in https://github.com/rails/sprockets/pull/744
• Ensure compatibility with esbuilds' base32 digests by @dhh in https://github.com/rails/sprockets/pull/726
• cache nil values in the CachedEnvironment by @lsylvester in https://github.com/rails/sprockets/pull/723
• Explain configuration for Rails engines by @pjmorse in https://github.com/rails/sprockets/pull/694
• Get rid off undefined method `start_with?' for nil:NilClass error by @dakolech in https://github.com/rails/sprockets/pull/684
• Added support for ERB in webmanifest files by @mashedkeyboard in https://github.com/rails/sprockets/pull/608
• Set application/js-sourcemap+json charset to unicode by @andresakata in https://github.com/rails/sprockets/pull/669
• Adding directive depends_on_directory by @jessecollier in https://github.com/rails/sprockets/pull/668
• Fix cache key for coffee script processor by @code-constructor in https://github.com/rails/sprockets/pull/670
• Add text/ejs to register_transformer_suffix for ERBProcessor by @cgunther in https://github.com/rails/sprockets/pull/674
• Allow age to be altered in clean_assets rake task by @nikolai-b in https://github.com/rails/sprockets/pull/677