Install drm4g in workflow in development mode

.github/workflows/python-package-conda.yml

@@ -34,8 +34,7 @@ jobs:
         echo $CONDA/bin >> $GITHUB_PATH
 #    - run: sudo apt-get install openssh-server -y; echo |ssh-keygen -t rsa;ls ~/.ssh;echo "valva"; cp ~/.ssh/id_rsa.pub ~/.ssh/authorized_keys;ls ~/.ssh; ssh -i ~/.ssh/id_rsa -oStrictHostKeyChecking=no localhost pwd
     - run: conda install pycrypto docopt sqlalchemy python-dateutil
-    - run: find ./ -name *.c| xargs touch ;find ./ -name *.h| xargs touch
-    - run: pip install .
+    - run: pip install -e .
 #    - name: Install dependencies
 #      run: |
 #        conda env update --file environment.yml --name base