fix CI: use source dependencies in rosdep

.gitlab-ci.yml

@@ -12,7 +12,7 @@ build-ws:
     - apt-get install -y ros-melodic-libfranka python-catkin-tools libeigen3-dev 
     - echo "source /opt/ros/melodic/setup.bash" >> ~/.bashrc
     - source ~/.bashrc
-    - rosdep install -y --from-paths .
+    - rosdep install -y -i --from-paths .
     - catkin build
   tags:
   - highmem