Release v4.0.9+1.20.6

Changelog

e2feb15 Fix java version for non-hosting publish
008692f Make an alt publish script that skips modrinth and curseforge
8ae09fb Add German translation
240d430 Version bump, update changelog
f8ac73a Create pl_pl.json
db539c7 Update changelog
05c4c5e [1.18+] Update implementation scanner to use gson's JsonArray#isEmpty method (Added in gson 2.8.7, not present on Minecraft 1.17.1-)
7e73ca7 Version bump, update README
b9e8a26 Copy in libs to make artifact upload actually useful
7560f73 Run unit tests in pipeline, move up CF/MR publish so we can skip them if tests fail
f6afa0d Add github license badge to README
6692d5c Update shared subproject task configs to meet modern gradle recommendations
f52afb0 Update target game versions block, update maven central badge
a561a44 Update editorconfig
e2d40ae Update gradle wrapper and loom
e30f55f Add French translation
f60edce Fix heading size
33e8fde Update badges and add supported game version notes
1f38068 Replace dead nexus publish + OSSRH snapshot publish with JReleaser + Central Portal
54d420d Update build pipeline dependencies
e1b668f Update github workflows
680c68f Replace call to deprecated URL constructor. Closes #15
5ab5711 Update github actions upload-artifact