Setup GitHub actions

.github/workflows/maven.yml

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+#
+# Copyright (c) 2021 Contributors to the Eclipse Foundation
+#
+# This program and the accompanying materials are made available under the
+# terms of the Eclipse Public License v. 2.0 which is available at
+# http://www.eclipse.org/legal/epl-2.0,
+# or the Eclipse Distribution License v. 1.0 which is available at
+# http://www.eclipse.org/org/documents/edl-v10.php.
+#
+# SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
+#
+
+name: Jakarta Mail CI
+
+on:
+  pull_request:
+  push:
+
+jobs:
+  build:
+    name: Test on JDK ${{ matrix.java_version }} 
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        java_version: [ 11, 16, 17-ea ]
+
+    steps:
+    - name: Checkout for build
+      uses: actions/checkout@v2.3.4
+    - name: Set up JDK
+      uses: actions/setup-java@v2
+      with:
+        distribution: 'zulu'
+        java-version: ${{ matrix.java_version }}
+    - name: Verify
+      run: bash travis.sh