Update pyright to 1.1.393 and type-checking python version to 3.11 (#4655)

Bumps the version of Python used for type-checking to 3.11. That is to
say, pyright now supports type-checking idioms that were introduced
after 3.7 like `FooType | None`.

Regenerated `Pipfile.lock` after updating `Pipfile` using `pipenv lock --dev --keep-outdated`.

Author: letitz

Pipfile

@@ -23,7 +23,7 @@ pipenv = "==2022.8.5"
 pyfakefs = "==4.4.0"
 pylint = "~=2.4"
 pylint-protobuf = "==0.21.0"
-pyright = "==1.1.378"
+pyright = "==1.1.393"
 selenium = "==3.141.0"
 twine = "*"
 WebTest = "==3.0.0"

Pipfile.lock

@@ -9,6 +9,6 @@
   "executionEnvironments": [{
     "root": "src",
     "extraPaths": [ "src/third_party" ],
-    "pythonVersion": "3.7"
+    "pythonVersion": "3.11"
   }]
 }