Merge branch 'renovate/django-phonenumber-field-6.x' into 'master'

Update dependency django-phonenumber-field to v6

See merge request !774

pyproject.toml

@@ -60,7 +60,7 @@ django-any-js = "^1.1"
 django-debug-toolbar = "^3.2"
 django-menu-generator-ng = "^1.2.3"
 django-tables2 = "^2.1"
-django-phonenumber-field = {version = "^5.2", extras = ["phonenumbers"]}
+django-phonenumber-field = {version = "^6.1", extras = ["phonenumbers"]}
 django-sass-processor = "1.0"
 libsass = "^0.21.0"
 colour = "^0.1.5"