remove duplicate gson dependency definition
- use kotlin 1.5.0 - use kotlin-stdlib: https://medium.com/@mbonnin/the-different-kotlin-stdlibs-explained-83d7c6bf293
Print used java version in Gradle
Gradle 6.9
Remove spotbug version: Access to 'toolVersion' exceeds its access rights Cannot assign a value to final field 'toolVersion'
Update translations
Update Nextcloud Android library
Update 3rd-party dependencies
