Use Java 11 for builds

Author: ShikaSD

.github/workflows/build-test.yml

@@ -9,9 +9,9 @@ jobs:
 
     steps:
     - uses: actions/checkout@v1
-    - name: set up JDK 1.8
-      uses: actions/setup-java@v1
+    - name: set up JDK
+      uses: actions/setup-java@v2
       with:
-        java-version: 1.8
+        java-version: 11
     - name: Build with Gradle
       run: ./gradlew build test

.github/workflows/release.yml

@@ -9,9 +9,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v1
-    - name: Set up JDK 1.8
-      uses: actions/setup-java@v1
+    - name: Set up JDK
+      uses: actions/setup-java@v2
       with:
-        java-version: 1.8
+        java-version: 11
     - name: Build with Gradle
       run: ./gradlew publishPlugins -Pgradle.publish.key=${{ secrets.GRADLE_PUBLISH_KEY }} -Pgradle.publish.secret=${{ secrets.GRADLE_PUBLISH_SECRET }}