Add LD_LIBRARY_PATH so can hopefully find libomp

Author: mcbarton

.github/workflows/main.yml

@@ -138,6 +138,7 @@ jobs:
         if: ${{ runner.os != 'windows' }}
         shell: bash -l {0}
         run: |
+          export LD_LIBRARY_PATH="$CONDA_PREFIX/lib:$LD_LIBRARY_PATH"
           cd test
           pytest -sv .  --reruns 5