Add validation for main class and api version

.github/renovate.json

@@ -0,0 +1,6 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": [
+    "github>eldoriarpg/.github"
+  ]
+}

.github/workflows/build.yml

@@ -3,18 +3,16 @@ on: [ push, pull_request ]
 
 jobs:
   build:
-    # Only run on PRs if the source branch is on someone else's repo
-    if: ${{ github.event_name != 'pull_request' || github.repository != github.event.pull_request.head.repo.full_name }}
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        java: [ 8, 11, 17 ]
+        java: [ 11, 17 ]
       fail-fast: true
     steps:
-      - uses: actions/checkout@v2.3.5
-      - uses: gradle/wrapper-validation-action@v1
+      - uses: actions/checkout@v4.2.2
+      - uses: gradle/wrapper-validation-action@v3
       - name: JDK ${{ matrix.java }}
-        uses: actions/setup-java@v2.3.1
+        uses: actions/setup-java@v4.5.0
         with:
           java-version: ${{ matrix.java }}
           cache: 'gradle'

.github/workflows/publish.yml

@@ -0,0 +1,25 @@
+name: Publish
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  publish_gradle:
+    name: Publish to gradle portal
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4.2.2
+      - uses: gradle/wrapper-validation-action@v3
+      - name: Setup JDK
+        uses: actions/setup-java@v4.5.0
+        with:
+          java-version: 11
+          cache: 'gradle'
+          distribution: 'temurin'
+      - name: build
+        env:
+          GRADLE_PUBLISH_KEY: ${{ secrets.GRADLE_PUBLISH_KEY }}
+          GRADLE_PUBLISH_SECRET: ${{ secrets.GRADLE_PUBLISH_SECRET }}
+        run: ./gradlew publishPlugin

HEADER.txt

@@ -0,0 +1,7 @@
+/*
+ *     SPDX-License-Identifier: MIT
+ *
+ *     Copyright (c) 2017 Minecrell <https://github.com/Minecrell>
+ *     Copyright (c) 2024 EldoriaRPG and Contributor <https://github.com/eldoriarpg>
+ */
+

LICENSE

@@ -1,6 +1,7 @@
 The MIT License (MIT)
 
 Copyright (c) 2017 Minecrell <https://github.com/Minecrell>
+Copyright (c) 2024 EldoriaRPG and Contributor <https://github.com/eldoriarpg>
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal