• Added --dev to dump-autoload command to allow force-dumping dev autoload rules even if dev requirements are not present (#9946)
• Fixed --no-scripts disabling events for plugins too instead of only disabling script handlers, using --no-plugins is the way to disable plugins (#9942)
• Fixed handling of deletions during package installs on some filesystems (#9945, #9947)
• Fixed undefined array access when using @php <absolute path> in a script handler (#9943)
• Fixed usage of InstalledVersions when loaded from composer/composer installed as a dependency and runtime Composer is v1 (#9937)