⬆ Update typing-extensions requirement (#160)

Updates the requirements on [typing-extensions](https://github.com/python/typing_extensions) to permit the latest version.
- [Release notes](https://github.com/python/typing_extensions/releases)
- [Changelog](https://github.com/python/typing_extensions/blob/main/CHANGELOG.md)
- [Commits](python/typing_extensions@3.7.4...4.8.0)

---
updated-dependencies:
- dependency-name: typing-extensions
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

pyproject.toml

@@ -37,7 +37,7 @@ classifiers = [
 ]
 
 dependencies = [
-    "typing-extensions >=3.7.4,<4.8.0",
+    "typing-extensions >=3.7.4,<4.9.0",
     "pydantic >=1.6.2,!=1.7,!=1.7.1,!=1.7.2,!=1.7.3,!=1.8,!=1.8.1,<2.0.0",
     "sqlalchemy[asyncio]>=1.3.18,<2.0.0",
     "PyPika ==0.48.9"