build(deps): add typing extensions dep

[qued]

Closes #1330.

Added typing-extensions as an explicit dependency (it was previously an implicit dependency via dataclasses-json).

This dependency should be explicit, since we import from it directly in unstructured.documents.elements. This has the added benefit that TypedDict will be available for Python 3.7 users.

Other changes:

• Ran pip-compile
• Fixed a bug in version-sync.sh that caused an error when using the sync functionality when syncing to a dev version from a release version.

Testing:

To test the Python 3.7 functionality, in a Python 3.7 environment install the base requirements and run

from unstructured.documents.elements import Element

This also works on main as typing_extensions is a requirement. However if you pip uninstall typing-extensions, and run the above code, it should fail. So this update makes sure typing-extensions doesn't get lost if the other dependencies move around.

To reproduce the version-sync.sh bug that was fixed, in main, increment the most recent version in CHANGELOG.md while leaving the version in __version__.py. Then add the following lines to version-sync.sh to simulate a particular set of circumstances, starting on line 114:

MAIN_IS_RELEASE=true
CURRENT_BRANCH="something-not-main"

Then run make version-sync.

The expected behavior is that the version in __version__.py is changed to the new version to match CHANGELOG.md, but instead it exits with an error.

The fix was to only do the version incrementation check when the script is running in -c or "check" mode.

[shreyanid]

worked in 3.7 for me!