[python-pimped] Remove safety; add tox

python-pimped/Dockerfile

@@ -17,7 +17,7 @@ RUN apt-get -y update && \
                           sudo \
                           yarnpkg
 
-RUN pip install "poetry==${POETRY_VERSION}" safety
+RUN pip install "poetry==${POETRY_VERSION}" tox
 
 RUN apt-get clean && \
     apt-get autoremove &&\