Add pytest in Dockefile source image

Author: AntoinePrv

dev/Dockerfile.src

@@ -35,6 +35,6 @@ RUN version_regex='^[[:blank:]]*'"$(echo ${python_version} | sed 's/\./\\./')"'\
     pyenv install ${python_full_version} && \
     pyenv global ${python_full_version} && \
     python -m pip install --no-cache-dir --upgrade pip && \
-    python -m pip install --no-cache-dir cmake numpy
+    python -m pip install --no-cache-dir cmake numpy pytest pyscipopt
 
 WORKDIR /app