Remove pkg_resources

[kigawas]

What was wrong?

This package is deprecated

Related to Issue https://github.com/ethereum/eth-utils/issues/242 Closes # NA

How was it fixed?

Remove pkg_resources import above 3.8

Todo:

• [x] Clean up commit history

• [x] Add or update documentation related to these changes

• [x] Add entry to the release notes

Cute Animal Picture

[reedsa]

Thanks so much for your latest contributions!