Requirements: upgrade gitpython because of security issue
we are using py3.8 so we don't need to ignore gitpython anymore
upgrade to latest version because it fixes a security issue reported at
@@ -51,8 +51,7 @@ celery==5.1.2 # pyup: ignore
django-allauth==0.42.0 # pyup: ignore
requests-oauthlib==1.3.1
-# GitPython >3.1.18 drops support for python 3.6.
-GitPython==3.1.18 # pyup: ignore
+GitPython==3.1.27
# Search
elasticsearch==7.17.0 # pyup: <8.0.0
