Update typing-extensions imports to compatible version

[njgheorghita]

What was wrong?

re @veox in the web3 gitter channel - typing_extensions was incorrectly used instead of the imported version from web3._utils.compat

Todo:

• Add entry to the release notes

Cute Animal Picture

[veox]

I've detected this by running ipython and then import web3 (or from web3.auto import w3) with a clean-room Python 3.8 install (via pip install -e .).

It resulted in

<long traceback snipped>
~/src/web3.py/web3/_utils/transactions.py in <module>
     17     HexBytes,
     18 )
---> 19 from typing_extensions import (
     20     Literal,
     21 )

Is there a test case for this?.. It would probably happen without ipython, too, with plain:

% python -c 'from web3.auto import w3'

[njgheorghita]

@kclowes Correct me if I'm wrong, but I vaguely recall you were writing up some kind of testing script that could handle ^?

[kclowes]

Yep, its in #1545. I stole it from Trinity and I'm not 100% sure, it looks to me like it's designed to be run before a release, rather than automatically by the test suite. I'm waiting on confirmation to be sure I'm not missing something though.

[kclowes]

This looks good to me!