- moved javadoc options from subprojects to root project
- removed "API" from titles in HTML files
- added subproject name and version to header and footer
- use links to Java 11 API
- added version info to manifest
- added META-INF/LICENSE
- Java source/target compatibility now defined in single location
- defined source file encoding for java compiler
- plugin versions now defined in single location (settings.gradle.kts)
- going back to Gradle 6.1.1
- using "extra" properties for bintray user and key
- allow easy enabling/disabling bintray upload dryMode and publishing