Prepare for release 0.6.7

Author: Christopher Clarke

.github/workflows/test.yml

@@ -12,7 +12,7 @@ jobs:
       fail-fast: false
       matrix:
         python-version: [ "3.7", "3.8", "3.9", "3.10"]
-        django-version: [ "3.0", "3.1", "3.2","4.0", "4.2", "5.0"]
+        django-version: [ "30", "31", "32","40", "42", "50"]
     steps:
       - uses: actions/checkout@v2