Further improvements of Android support, declarativization of the Now in Android demo, new software types for Swift, new declarative.gradle.org site

🚀 New features and improvements

• Allow disabling convention properties by using enabled=false (#86)
• Add swiftLibrary and swiftApplication software types (#55, #87)
• Improve conventions for JVM software types and CLI application software types (#75)
• Supports additional properties and conventions for AndroidX Testing and Room plugins (#72)
• Add minimal support for necessary proguard file property for Now in Android (#84)
• Adapt Now in Android to the new syntax features and make it ready for declarative conventions (#60, #67)
• Partial support for Protobuf in Now in Android (#85)

📝 Documentation updates

• Publish the declarative.gradle.org site (#69, #63)
• Add Getting Started with Declarative Gradle (#63)
• First readme for the Android documentation (#62, #89)
• Start the list of Declarative Gradle related publications (#80)
• Clarify the roadmap state and milestones (#73 #68)
• Add stub Java and Kotlin docs pages (#74, #79)

👻 Maintenance

• Setup integration testing for Android Plugin (#88)
• Add Release Drafter for changelog drafts automation (#81, #83, #93)
• Refactor to remove duplication (#70)
• Various minor cleanups and improvements to the project (#76)

Thanks to all contributors! Among them, code committers: @tresat, @adammurdoch @octylFractal @eskatos @lkasso @oleg-nenashev @SimonMarquis @alexanderankin