add option --no-root to poetry installation in ci pipeline

Author: danielfeismann

.github/workflows/simple-ci.yml

@@ -80,7 +80,7 @@ jobs:
       # install your root project, if required
       #----------------------------------------------
       - name: Install library
-        run: poetry install --no-interaction
+        run: poetry install --no-interaction --no-root
       #----------------------------------------------
       #    run test suite
       #----------------------------------------------