This Beta release (it's still work in progress, but works) is a rewrite of the internal workings of the NBT-API. So far the rewrite has added-up to removing 400 lines while keeping all functions and making the code better maintainable. I was able to add 1.13 support into this build in about 30 minutes of work, so the cleared code paid out.
Featurelist:

• All (finished migrating) reflections get checked at plugin start, so all "Class not found" and "Method not found" will show up at startup
• 1.13 support
• Improved performance and less GC heavy by caching all Reflections

This build has had it's startup test ran against 1.8.8-1.13 without error. 1.7.10 spat out some errors (as expected), but since only 2 servers are using 1.7.10 this will be pushed back to be fixed.