chore(deps): update dependency pg8000 to v1.21.1 (#157)

Author: renovate-bot

requirements.txt

@@ -1,7 +1,7 @@
 aiohttp==3.7.4.post0
 cryptography==3.4.8
 PyMySQL==1.0.2
-pg8000==1.21.0
+pg8000==1.21.1
 python-tds==1.11.0
 pyopenssl==20.0.1
 Requests==2.26.0

setup.py

@@ -78,7 +78,7 @@
     install_requires=core_dependencies,
     extras_require={
         "pymysql": ["PyMySQL==1.0.2"],
-        "pg8000": ["pg8000==1.20.0"],
+        "pg8000": ["pg8000==1.21.1"],
         "pytds": ["python-tds==1.11.0"]
     },
     python_requires=">=3.6",