Add typing_extensions as a main dependency (#196)

* add typing_extensions as a main dependency

* Restore the previous dependency

Co-authored-by: Brad Keryan <[email protected]>

* poetry lock

---------

Co-authored-by: Mike Prosser <[email protected]>
Co-authored-by: Brad Keryan <[email protected]>

Author: 3 people

poetry.lock

@@ -42,6 +42,7 @@ numpy = [
   { version = ">=2.1", python = "^3.13" }
 ]
 hightime = { version = ">=0.2.2", allow-prereleases = true }
+typing-extensions = ">=4.13.2"
 
 [tool.poetry.group.dev.dependencies]
 # Specify additional NumPy version constraints to speed up locking and test with binary wheels that support PyPy.