chore(deps): update dependency pg8000 to v1.29.1 (GoogleCloudPlatform#364)

Author: renovate-bot

requirements-test.txt

@@ -14,5 +14,5 @@ types-PyMySQL==1.0.19
 types-mock==4.0.13
 twine==4.0.0
 PyMySQL==1.0.2
-pg8000==1.28.3
+pg8000==1.29.1
 python-tds==1.11.0

setup.py

@@ -78,7 +78,7 @@
     install_requires=core_dependencies,
     extras_require={
         "pymysql": ["PyMySQL==1.0.2"],
-        "pg8000": ["pg8000==1.28.3"],
+        "pg8000": ["pg8000==1.29.1"],
         "pytds": ["python-tds==1.11.0"]
     },
     python_requires=">=3.7",