Install pip requirements

.github/workflows/build.yml

@@ -23,6 +23,7 @@ jobs:
         run: make basler ARGS="-ci"
       - name: Install packages via rosdep
         run: |
+          pip install -r requirements/dev.txt
           rosdep update
           sudo apt install -y libunwind-dev
           # Small hack to make rosdep install all dependencies at once