Release Notes for 4.0.0

Backwards incompatible release (major)

This release introduces analysis for property types, which are to be considered "used symbols", and therefore should be checked by this tool: this addition is considered backwards-incompatible, since it may lead this tool to behave differently on codebases that would previously pass all pre-existing checks.

4.0.0

• Total issues resolved: 1

• Total pull requests resolved: 7

• Total contributors: 4

• 341: Fix typo in readme thanks to @simPod

enhancement

• 340: Drop PHP 7.4 thanks to @simPod
• 335: Delete 3.9.x branch thanks to @Ocramius
• 334: Add mutation tests to pipeline thanks to @dkreuer

dependencies,enhancement

• 339: Bump psalm to v4.15 thanks to @simPod
• 336: Allow Symfony 6 thanks to @simPod

dependencies,duplicate,enhancement

• 338: Bump psalm to v4.15 thanks to @simPod

bc break,enhancement

• 321: Collect class property types as "used symbols" thanks to @martinssipenko