Minor fixes

Author: fandreuz

.github/workflows/export_tutorials.yml

@@ -25,11 +25,9 @@ jobs:
       run: |
         python3 -m pip install --upgrade pip
         python3 -m pip install .[test]
-        python3 -m pip install .
+        python3 -m pip install -e .
         # Dependencies for tutorials
         python3 -m pip install jupyter pandas ezyrb opencv-python ffmpeg-python black[jupyter]
-        # timeout not available by default on MacOS
-        brew install coreutils || true
 
     - uses: actions/cache@v2
       id: cache-segtrackv2