Running jdepend on non-Java 13 environment

[PYangDizzle]

This issue is related to #7
I tried updating the jar version to 2.10 and noticed that the classes were compiled with major version 57, Java 13. Is that necessary? My environment is on Java 8 and it can't load the classes.

I could compile the source myself and target Java 8, but wouldn't you want to keep the major version down to 46, Java 1.2 just like 2.9 or Java 8 which was the reason why you needed the update.

[clarkware]

Ah, that's a good point. Honestly, I'm not even sure how to do that. It's been over 15 years since I used Java. :-) I just figured everyone was using Java 13, which was a bad assumption on my part. Would someone mind compiling it with a version that's more suitable and submitting a PR?