TST: done run executable tests on windows

.github/workflows/basic-install.yml

@@ -40,6 +40,10 @@ jobs:
           python -c "import bilby.hyper"
           python -c "import cli_bilby"
           python test/import_test.py
+      - name: Test executables
+        # I don't understand windows shell commands
+        if: matrix.os != "windows-latest"
+        run: |
           for script in $(pip show -f bilby | grep "bin\/" | xargs -I {} basename {}); do
               ${script} --help;
           done