config: adds github workflow ci

Author: rnveach

.github/workflows/maven.yml

@@ -0,0 +1,31 @@
+name: CI
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+jobs:
+  install:
+    strategy:
+      matrix:
+        platform: [ubuntu-latest, macos-latest, windows-latest]
+    runs-on: ${{ matrix.platform }}
+    steps:
+    - uses: actions/checkout@v3
+      with:
+        fetch-depth: 50
+
+    - name: Setup local maven cache
+      uses: actions/cache@v3
+      with:
+        path: ~/.m2/repository
+        key: maven-cache-${{ hashFiles('**/pom.xml') }}
+
+    - name: Set up JDK 11
+      uses: actions/setup-java@v3
+      with:
+        distribution: temurin
+        java-version: 11
+
+    - name: Build with Maven
+      run: mvn --errors --no-transfer-progress install