bump to 0.8.1

Merge pull request postgresml#93 from postgresml/montana/predictions

Don't sort columns inconsistently

bump extension version (postgresml#72)

update caching policy

Bump version again (postgresml#42)

Push rename to Pypi (postgresml#41)

Bump version (postgresml#34)

Merge pull request postgresml#31 from postgresml/montana/smithing

feedback on sentence structure

Merge pull request postgresml#13 from postgresml/montana/readme

Cleanup installation instructions

Merge pull request postgresml#9 from postgresml/levkk-test-publish

test publish