[#135] Add GH action to build on PRs and Merge (#136)

Author: mattrpav

.github/workflows/maven-build-action.yaml

@@ -0,0 +1,22 @@
+name: Maven CI
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build_and_test:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up JDK 11
+      uses: actions/setup-java@v1
+      with:
+        java-version: 11
+
+    - name: Build project with Maven
+      run: mvn clean install