Only publish substantial changes

This is a small general workflow rework based on upstream

.github/workflows/publish.yml

@@ -2,22 +2,23 @@ name: Java CI
 
 on:
   push:
+    paths:
+      - '**.gradle'
+      - '**.properties'
+      - '**/src/**'
     branches:
-      - 'dev/0.6-forge'
-      - 'dev/0.7-forge'
+      - 'dev/**'
 
 jobs:
   build:
-
-    runs-on: ubuntu-latest
-
+    runs-on: ubuntu-20.04
+    container:
+      image: openjdk:8-jdk
+      options: --user root
     steps:
       - uses: actions/checkout@v1
-      - name: Set up JDK 1.8
-        uses: actions/setup-java@v1
-        with:
-          java-version: 1.8
+      - uses: gradle/wrapper-validation-action@v1
       - name: Upload to Maven
         run: ./gradlew publish --stacktrace
         env:
-          MAVEN_PASS: ${{ secrets.MAVEN_PASS }}
+          MAVEN_PASS: ${{ secrets.MAVEN_PASS }}