Merge pull request #421 from ruby-amqp/remove-legacy-things

Modernize gemspec and YARD settings file paths

Fix CHANGELOG Ruby version requirement (3.0, not 3.1)

Remove Guard and darwin-specific development dependencies

Merge pull request #420 from ruby-amqp/update-license-file

Update copyright year to 2026

docs: Remove Git conflict marker from CHANGELOG

Merge branch 'Garaio-REM-update_docs_and_remove_legacy_things'

Bunny `3.1.0` requires Ruby `3.1.0`

Resolve conflicts #417

Resolve conflicts #417

Bunny `3.1.0` requires Ruby `3.1.0`

Bump dev version

1.4.0

Do not promise a `1.4.0` release date before it happens