* Update PBXProjGenerator to include 'Base' developmentRegion and file system derived knownRegions in the output knownRegions
* Update CHANGELOG.md
* Run tests to update fixtures
* Update SettingsPresets to include new and modified values as part of Xcode 12's TemplateInfo.plist
* Update CHANGELOG.md
* Update Test Fixtures after running unit tests
* Revert change to GCC_PREPROCESSOR_DEFINITIONS order (https://github.com/yonaskolb/XcodeGen/pull/953\#discussion_r497486482)
* Run tests to update fixtures