Bump version to 4.16.1.dev0 (#776)

Co-authored-by: Sebastian Rittau <sebastian.rittau@zfutura.de>

Author: AlexWaygood

pyproject.toml

@@ -6,7 +6,7 @@ build-backend = "flit_core.buildapi"
 # Project metadata
 [project]
 name = "typing_extensions"
-version = "4.16.0"
+version = "4.16.1.dev0"
 description = "Backported and Experimental Type Hints for Python 3.9+"
 readme = "README.md"
 requires-python = ">=3.9"