Update django-oauth-toolkit requirement from ==2.3.* to ==3.0.*

Updates the requirements on [django-oauth-toolkit](https://github.com/jazzband/django-oauth-toolkit) to permit the latest version.
- [Release notes](https://github.com/jazzband/django-oauth-toolkit/releases)
- [Changelog](https://github.com/jazzband/django-oauth-toolkit/blob/master/CHANGELOG.md)
- [Commits](jazzband/django-oauth-toolkit@2.3.0...3.0.1)

---
updated-dependencies:
- dependency-name: django-oauth-toolkit
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

pyproject.toml

@@ -76,7 +76,7 @@ dependencies = [
         'jsonschema',
         'django-hijack==2.*',
         'openpyxl==3.1.*',
-        'django-oauth-toolkit==2.3.*',
+        'django-oauth-toolkit==3.0.*',
         'oauthlib==3.2.*',
         'django-phonenumber-field==7.1.*',
         'phonenumberslite==8.13.*',