| ⇢ | A | ComposerConfiguration added |
| ⇢ | A | ComposerConfiguration::getDevPackagePaths() added | |
| ⇢ | A | ComposerConfiguration::getVendorDir() added | |
| ⇢ | A | Box::dumpAutoload() added | |
| ⇢ | A | Configuration::retrieveComposerLockFileContents() added | |
| ⇢ | A | ComposerConfiguration::getDevPackageNames() added | |
| ⇢ | A | ComposerConfiguration::retrieveDevPackages() added | |
| A | ↘ | B | Json::decode() got worse |
| A | ↘ | B | Configuration::retrieveAllFiles() got worse |