Sorry for the long delay to post the release, once again, IRL and my mods have happened. Working 1.21.5 snapshots have been available since spigot 1.21.5 got released.

## What's Changed
* Add 1.21.5 support (Spigot/Paper/forks)
* Updated Wiki pages a lot
* Add DataVersion for itemstack conversions by @SoSeDiK in https://github.com/tr7zw/Item-NBT-API/pull/319
* Fixed list#remove(Object) removing every instance of the Object, not just the first one. #293
* Add a method to extract difference between two compounds by @SoSeDiK in https://github.com/tr7zw/Item-NBT-API/pull/321
* Update "Reading world data" wiki example by @SoSeDiK in https://github.com/tr7zw/Item-NBT-API/pull/320
* Bump org.apache.maven.plugins:maven-javadoc-plugin from 3.11.1 to 3.11.2 by @dependabot in https://github.com/tr7zw/Item-NBT-API/pull/312
* Add EvenMoreFish to Plugins.md by @FireML in https://github.com/tr7zw/Item-NBT-API/pull/311
* Bump org.codehaus.mojo:license-maven-plugin from 2.4.0 to 2.5.0 by @dependabot in https://github.com/tr7zw/Item-NBT-API/pull/309
* Update wiki by @SoSeDiK in https://github.com/tr7zw/Item-NBT-API/pull/313
* Bump org.apache.maven.plugins:maven-compiler-plugin from 3.13.0 to 3.14.0 by @dependabot in https://github.com/tr7zw/Item-NBT-API/pull/316

## New Contributors
* @FireML made their first contribution in https://github.com/tr7zw/Item-NBT-API/pull/311

**Full Changelog**: https://github.com/tr7zw/Item-NBT-API/compare/2.14.1...2.15.0