Install STUMPY/dependencies in Github actions yaml

Author: seanlaw

.github/workflows/github-actions.yml

@@ -9,9 +9,11 @@ jobs:
         python-version: ['3.6', '3.7', '3.8']
     steps:
       - uses: actions/checkout@v2
-      - name: Set up Python
+      - name: Set Up Python
         uses: actions/setup-python@v2
         with:
           python-version: ${{ matrix.python-version }}
-      - name: Display Python version
+      - name: Display Python Version
         run: python -c "import sys; print(sys.version)"
+      - name: Install STUMPY And Other Dependencies
+        run: pip install --editable .[ci]