CI workflow added

.github/workflows/main.yml

@@ -0,0 +1,20 @@
+name: Java CI with Maven for v2.x
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up JDK 1.8
+      uses: actions/setup-java@v1
+      with:
+        java-version: 1.8
+    - name: Build with Maven
+      run: mvn clean install -DskipSigning
+