Setup a github workflow for python testing

.github/workflows/python-package.yml

@@ -0,0 +1,50 @@
+name: Quick Test
+
+on: push
+
+jobs:
+  default:
+
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-18.04, macos-latest]
+        python-version: [2.7, 3.8]
+        include:
+          - os: ubuntu-18.04
+            python-version: 3.9
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Set environment variables
+      run: |
+        if [[ ${{ runner.os }} == macOS ]]; then
+        echo "LDFLAGS=-L/usr/local/opt/openssl@1.1/lib" >> $GITHUB_ENV
+        echo "CPPFLAGS=-I/usr/local/opt/openssl@1.1/include" >> $GITHUB_ENV
+        fi
+    - name: Install apt dependencies
+      if: ${{ runner.os == 'Linux' }}
+      run: |
+        sudo apt-get install -yq --no-install-suggests --no-install-recommends \
+        build-essential libcap-dev libssl-dev python-all-dev python-qt4 tor xvfb
+    - name: Install brew dependencies
+      if: ${{ runner.os == 'macOS' }}
+      run: |
+        brew install tor
+        brew services start tor
+    - name: Install python dependencies
+      run: |
+        python -m pip install --upgrade pip
+        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+        python setup.py install
+    - name: Test
+      run: |
+        export PYTHONWARNINGS=all
+        python checkdeps.py
+        python src/bitmessagemain.py -t
+        python -bm tests