chore(deps): update dependency pg8000 to v1.21.0 (#142)

* chore(deps): update dependency pg8000 to v1.21.0

Author: renovate-bot

google/cloud/sql/connector/refresh_utils.py

@@ -163,7 +163,7 @@ async def _get_ephemeral(
     if enable_iam_auth:
         # TODO: remove this once issue with OAuth2 Tokens is resolved.
         # See https://github.com/GoogleCloudPlatform/cloud-sql-python-connector/issues/137
-        data["access_token"] = credentials.token.rstrip('.')
+        data["access_token"] = credentials.token.rstrip(".")
 
     resp = await client_session.post(
         url, headers=headers, json=data, raise_for_status=True

requirements.txt

@@ -1,7 +1,7 @@
 aiohttp==3.7.4.post0
 cryptography==3.4.7
 PyMySQL==1.0.2
-pg8000==1.20.0
+pg8000==1.21.0
 python-tds==1.11.0
 pyopenssl==20.0.1
 Requests==2.26.0