Run CI against all supported Java versions

Author: oleg-nenashev

.github/workflows/ci.yml

@@ -17,12 +17,18 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        jdk: [8, 11, 17]
+    env:
+      JDK_VERSION:  ${{ matrix.jdk }}
     steps:
     - uses: actions/checkout@v3
     - name: Set up JDK 11
       uses: actions/setup-java@v3
       with:
-        java-version: '11'
+        java-version: ${{ matrix.jdk }}
         distribution: 'temurin'
         cache: maven
     - name: Build with Maven