Build/Libraries - Pin `referencing` library which breaks due to out-dated flask_expects_json, remove pip upgrade in test(#2912)

.github/workflows/pypi-release.yml

@@ -45,7 +45,6 @@ jobs:
     - name: Test that the basic pip built package runs without error
       run: |
         set -ex
-        sudo pip3 install --upgrade pip 
         pip3 install dist/changedetection.io*.whl
         changedetection.io -d /tmp -p 10000 &
         sleep 3

requirements.txt

@@ -95,5 +95,8 @@ babel
 # Needed for > 3.10, https://github.com/microsoft/playwright-python/issues/2096
 greenlet >= 3.0.3
 
+# Pinned or it causes problems with flask_expects_json which seems unmaintained
+referencing==0.35.1
+
 # Scheduler - Windows seemed to miss a lot of default timezone info (even "UTC" !)
 tzdata