Bump requests-oauthlib from 1.3.0 to 1.3.1 (#1636)

* Bump requests-oauthlib from 1.3.0 to 1.3.1

Bumps [requests-oauthlib](https://github.com/requests/requests-oauthlib) from 1.3.0 to 1.3.1.
- [Release notes](https://github.com/requests/requests-oauthlib/releases)
- [Changelog](https://github.com/requests/requests-oauthlib/blob/master/HISTORY.rst)
- [Commits](https://github.com/requests/requests-oauthlib/compare/v1.3.0...v1.3.1)

---
updated-dependencies:
- dependency-name: requests-oauthlib
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

* Update requests-oauthlib==1.3.1

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: JonnyWong16 <9099342+JonnyWong16@users.noreply.github.com>

[skip ci]

lib/oauthlib/openid/connect/core/grant_types/__init__.py

@@ -10,3 +10,4 @@ from .dispatchers import (
 )
 from .hybrid import HybridGrant
 from .implicit import ImplicitGrant
+from .refresh_token import RefreshTokenGrant

lib/oauthlib/openid/connect/core/grant_types/refresh_token.py

@@ -0,0 +1,34 @@
+"""
+oauthlib.openid.connect.core.grant_types
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+"""
+import logging
+
+from oauthlib.oauth2.rfc6749.grant_types.refresh_token import (
+    RefreshTokenGrant as OAuth2RefreshTokenGrant,
+)
+
+from .base import GrantTypeBase
+
+log = logging.getLogger(__name__)
+
+
+class RefreshTokenGrant(GrantTypeBase):
+
+    def __init__(self, request_validator=None, **kwargs):
+        self.proxy_target = OAuth2RefreshTokenGrant(
+            request_validator=request_validator, **kwargs)
+        self.register_token_modifier(self.add_id_token)
+
+    def add_id_token(self, token, token_handler, request):
+        """
+        Construct an initial version of id_token, and let the
+        request_validator sign or encrypt it.
+
+        The authorization_code version of this method is used to
+        retrieve the nonce accordingly to the code storage.
+        """
+        if not self.request_validator.refresh_id_token(request):
+            return token
+
+        return super().add_id_token(token, token_handler, request)

lib/oauthlib/openid/connect/core/request_validator.py

@@ -306,3 +306,15 @@ class RequestValidator(OAuth2RequestValidator):
         Method is used by:
             UserInfoEndpoint
         """
+
+    def refresh_id_token(self, request):
+        """Whether the id token should be refreshed. Default, True
+
+        :param request: OAuthlib request.
+        :type request: oauthlib.common.Request
+        :rtype: True or False
+
+        Method is used by:
+            RefreshTokenGrant
+        """
+        return True