Add Github build workflow

Author: mathleite

.github/workflows/build.yml

@@ -0,0 +1,26 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  build:
+    runs-on: [ubuntu-latest]
+    steps:
+      - uses: actions/checkout@v1
+
+      - name: Cache PHP dependencies
+        uses: actions/cache@v1
+        with:
+          path: vendor
+          key: ${{ runner.OS }}-build-${{ hashFiles('**/composer.lock') }}
+
+      - uses: php-actions/composer@master
+
+      run: |
+        cp .env.example .env
+
+      - name: Run Tests
+        run: composer tests-exclude-notification