v1.0.0

We made it! 1.0.0!!

Ended up with more changes than expected since 0.10.0, some good things to get in.

For more information, see https://ruckstack.com/blog/2021/03/ruckstack-1.0.0-released/

Issue list: https://github.com/ruckstack/ruckstack/issues?q=is%3Aissue+milestone%3Av1.0.0+is%3Aclosed