v1.15.7

Various Fixes & improvement

• Generalize part of the nms
• Reobf nms for spigot 1.21.11
• Fix spigot having start issue with adventure being absent
• Generic paper nms

Note:
Has generic paper nms is now included, unless there is change to the anvil code or new enchantment/enchantable items paper user do not need to update the plugin on minecraft version upgrade anymore

What's Changed

• fix spigot and refactor some gradlew things by @alexcrea in #101
• Better old versions support by @alexcrea in #102

Full Changelog: v1.15.6...v1.15.7