Support GEOMETRY, SUPER Redshift datatypes

[Brooke-white]

Closes #209, #224. Adds support for Redshift SUPER and GEOMETRY datatypes.

credit to @rectalogic for their approach for SUPER datatype support, which I've duplicated in this PR.

Todos

• MIT compatible
• Tests
• Documentation
• Updated CHANGES.rst

[jklukas]

Looks good. I just kicked off integration tests. If those look good, we can go ahead and merge.

[Brooke-white]

@jklukas -- did your test run for this change look ok?

[jklukas]

@jklukas -- did your test run for this change look ok?

Thanks for the reminder. That run was flaky and errored out. I'm running a new one now. Note that since you now have commit access, you can make future PRs via a branch on this repo, which will automatically kick off the integration tests.

You can also kick off integation tests for forks by verifying that the content isn't malicious, and then pushing the changeset to a branch on this repo. I use https://github.com/jklukas/git-push-fork-to-upstream-branch to manage that workflow.

[jklukas]

This change is now released in 0.8.8