Miscellaneous things

[ThexXTURBOXx]

Description

• Update Gradle for LGTM
• Update dependencies in general
• Fix tests for Windows users with a space in their username
• Cleanup Gradle files
• Fix Jitpack build by adding the maven-publish plugin
• Fix calls to deprecated methods

[skylot]

@ThexXTURBOXx before next PR please read contributing guide, because as stated in first line:

Please don't submit any code style fixes, dependencies updates or other changes which are not fixing any issues.

I will not accept changes which are not necessary.
So here I reverted:

• a deprecation fixes - because this is not a correct way to resolve them. These deprecated methods is just a quick hack to glue old code with a new approach, so here should be a big refactoring to fix them.
• imports in gradle file - I am not sure about this one, but these fullname classes used intentionally, check PR fix: Workaround for IntelliJ bug on import line in build.gradle #766.
• I leave dependency updates for now, but please don't submit them again :)

Anyway, thanks for other changes 👍🏽

[ThexXTURBOXx]

I'm sorry, I've read the contribution guideline only after I changed the files.
Thank you for accepting this PR anyways! :)
For the future, I know what to do :)