Support class file versions >63 (Java 19)

[chairclr]

https://javaalmanac.io/bytecode/versions/

The current supported version is 63 (which is Java 19), which came out about 3 years ago.

[wasabii]

Sorry, I responded too fast. Thought you were asking for versions up to 63. Sure. That would be nice.

[chairclr]

Have there been any major changes to classfiles between 63 and now (70)? Or is this just a matter of updating a constant for sanity?

[wasabii]

Yes. Records. Probably other things. I was just taking a look at the specs.