Tag/Branch jitpack-SNAPSHOT, which is a important dependency for jabref, is deleted

You deleted the tag/branch jitpack-SNAPSHOT but this is absolutely needed by jabref to be able to build:
```gradle
    id 'com.github.koppor.gradle-modules-plugin' version 'jitpack-SNAPSHOT'
```

Please create that tag/branch again otherwise it is not possible to build jabref anymore.