Java11 compatible

[wimjongman]

Move all plugins to java 11

[jantje]

I think this pull request is ready to pull.
Can you change the status from draft to ready?

[wimjongman]

Early start? 🌞

[jantje]

Nope: bed time story ;-)

[jantje]

There is a problem with this pull request.
When you try to run the product in java11 you will get the error
Caused by: java.lang.UnsupportedClassVersionError: io/sloeber/core/toolchain/ArduinoLanguageProvider has been compiled by a more recent version of the Java Runtime (class file version 61.0), this version of the Java Runtime only recognizes class file versions up to 55.0
I have been trying for a couple of days to fix this but I failed. so I went back to this branch and I noticed the same issue here.
I tried to fix here and it worked.
I'm bafflegasted but happy that it works so I will create a new pull request.
This is my workspace compiler setting

java11errorlog.log

[jantje]

I tried to push the changes and now I get

He complains about the actions but I didn't touch those :-(

[jantje]

So I switched back to the branch I was working on and now it works :-S