chore(deps): update dependency protobuf to v3.20.3 [security]

Author: renovate[bot]

packages/depscloud-api-python/setup.py

@@ -8,7 +8,7 @@
     author='deps.cloud Authors',
     url='https://deps.cloud/',
     install_requires=[
-        "protobuf==3.14.0",
+        "protobuf==3.20.3",
         "grpcio==1.33.2"
     ],
     packages=find_packages()