v1.1.0

TL;DR

Documentation updates, and support for GOVERNANCE upgrades from LOCAL and DATABASE providers

Details

• Update README with LICENSE by @mkaczanowski in #10
• Set priority key to not null by @mkaczanowski in #11
• handle multiple upgrades for the same height in chain provider by @mkaczanowski in #13
• update migrations readme by @mkaczanowski in #14
• support governance type upgrades from non chain providers by @mkaczanowski in #15
• add integration test for governance upgrades by @mkaczanowski in #16

Full Changelog: v1.0.0...v1.1.0