Github build,test action and dependabot

Use 11 because apparently Temurin does not have 9

Make action load submodule

.github/dependabot.yml

@@ -0,0 +1,7 @@
+version: 2
+updates:
+- package-ecosystem: maven
+  directory: "/"
+  schedule:
+    interval: "daily"
+  open-pull-requests-limit: 10

.github/workflows/maven.yml

@@ -0,0 +1,40 @@
+name: Build with Maven
+
+on:
+  push:
+    branches: [ github_action ]
+  pull_request:
+    branches: [ github_action ]
+  workflow_dispatch:
+
+jobs:
+  build:
+
+    strategy:
+      matrix:
+        java: ['11', '17', '21']
+
+    runs-on: ubuntu-latest
+    env:
+      BUILD_NUMBER: "${{github.run_number}}"
+      MAVEN_CLI_OPTS: "--batch-mode --no-transfer-progress"
+
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          submodules: 'true'
+      - name: Set up JDK ${{ matrix.java }}
+        uses: actions/setup-java@v3
+        with:
+          java-version: ${{ matrix.java }}
+          distribution: 'temurin'
+          cache: 'maven'
+      - name: Build and Test with Maven
+        run: mvn $MAVEN_CLI_OPTS clean verify 
+      - name: Upload Test Results
+        uses: actions/upload-artifact@v3
+        if: ${{ always() && matrix.java == '11' }} 
+        with:
+          name: test-results
+          path: 'target/surefire-reports/TEST-*.xml'
+

.github/workflows/test-report.yml

@@ -0,0 +1,16 @@
+name: 'Test Report'
+on:
+  workflow_run:
+    workflows: ['Build with Maven']
+    types:
+      - completed
+jobs:
+  report:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: dorny/test-reporter@v1
+      with:
+        artifact: test-results
+        name: Maven Surefire Tests
+        path: 'TEST-*.xml'
+        reporter: java-junit