updated testing workflow to install package directly

.github/workflows/tests.yml

@@ -44,10 +44,11 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
+        pip install .
         pip install flake8 pytest pytest-cov
         # gooey has extra dependencies not installed by pip so skip gooey
         #pip install numpy h5py matplotlib scipy tqdm
-        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+        #if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
     - name: Lint with flake8
       run: |
         # stop the build if there are Python syntax errors or undefined names