Dependency cleanup #240

Describe the idea (required)

I noticed that this project brings a bunch of dependencies.

I'm not sure if all of them are still needed or are correct.

For example:

• joda-time can likely be replaced by Java 8+ Time API
• JSR305 should likely be declared as "provided" and not shipped at runtime (current scope is compile)

Tell us about the expected behaviour (required)

As few dependencies as possible should be downloaded when running the plugins.

Context (optional)

No response