I got notified that the external download link isn't allowed, so from now on, the SpigotMC downloads will be hosted on SpigotMC again. This is the same 2.15.0 file as before, so no need to update!

Original changelog:
## 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