added github test action

.github/workflows/tests.yml

@@ -0,0 +1,33 @@
+# This is tests workflow for GitHub Actions
+
+name: Tests
+
+on:
+  push:
+    branches: [ master, develop ]
+  pull_request:
+    branches: [ master, develop ]
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  build:
+    runs-on: ubuntu-18.04
+    steps:
+    # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+    - uses: actions/checkout@v2
+
+    - name: Run w3af
+      run: ./w3af_console
+
+    - name: install deps
+      run: /tmp/w3af_dependency_install.sh
+
+
+  test:
+    runs-on: ubuntu-18.04
+    steps:
+    - uses: actions/checkout@v2
+
+    # Runs a set of commands using the runners shell
+    - name: Run tests
+      run: pytest