Whitelist referencing in license tests with MIT license (https://pypi.org/project/referencing/)

Author: NeonDaniel

.github/workflows/license_tests.yml

@@ -9,4 +9,4 @@ jobs:
   license_tests:
     uses: neongeckocom/.github/.github/workflows/license_tests.yml@master
     with:
-      packages-exclude: '^(tqdm|bs4|gradio|bitstruct|attrs).*'
+      packages-exclude: '^(tqdm|bs4|gradio|bitstruct|attrs|referencing).*'