fix for latest macos big sur update + geopandas/shapely: https://stac…

…koverflow.com/questions/64821850/error-when-importing-geopandas-oserror-could-not-find-lib-c-or-load-any-of-its

.github/workflows/pull_request_tests.yml

@@ -27,6 +27,7 @@ jobs:
       shell: bash -l {0}
       run: |
         conda install rtree pip pytest geopandas
+        pip install --upgrade --force-reinstall shapely
         pip install pytest-cov
         pip install -e .
         pip install HOPP