Installing itself in github pipeline (#16)

to catch possible pip install errors

.github/workflows/python-package.yml

@@ -32,6 +32,7 @@ jobs:
         # Installing pytorch on cpu and torchvision for running tests 
         python -m pip install torch torchvision --index-url https://download.pytorch.org/whl/cpu
         python -m pip install matplotlib
+        python -m pip install .
     - name: Lint with flake8
       run: |
         # stop the build if there are Python syntax errors or undefined names