Add more empty-parens methods to the Scalafix rule

[bpholt]

I think this is all of them, but I just went through the source files manually, so it's possible I missed some.

[ekrich]

OMG, that is crazy - what have I done.

[bpholt]

For reference:

Scala 2.11.12 uses scala-asm 5.2.0-scala-2, which only supports classfile versions up to Java 9. (Here's where it checks the classfile version—that's where the exception was being thrown when the tests were previously failing.)

Scala 2.12.14 uses scala-asm 9.1.0-scala-1, which supports classfile versions up to Java 17.

Scala 2.13.6 also uses scala-asm 9.1.0-scala-1.

[ekrich]

Ok, so we need to exclude the 2.11 and Java 17 from the CI matrix. That probably needs to be separate PR - I can do that this weekend. Hopefully we can drop 2.11 at some point soon for new versions or maybe we could do that now?