Run CI on multiple Java versions

Author: chadlwilson

.github/workflows/maven.yml

@@ -16,15 +16,19 @@ on:
 
 jobs:
   build:
-
     runs-on: ubuntu-latest
 
+    strategy:
+      matrix:
+        java_version: [ '8', '11', '17', '21' ]
+      fail-fast: false
+
     steps:
     - uses: actions/checkout@v4
-    - name: Set up JDK 8 
+    - name: Set up JDK
       uses: actions/setup-java@v4
       with:
-        java-version: '8'
+        java-version: ${{ matrix.java_version }}
         distribution: 'temurin'
         cache: maven
     - name: Build with Maven