Prop 99: Token Registry Proposal: Add Support for Cronos(CRO)

This is a token registry proposal to add support for Cronos.Please vote 'Yes' if you support to this proposal, and 'No' if you oppose it.

Commonwealth post for CMST: https://commonwealth.im/umee/discussion/7633-list-cro-on-umee .

Please update your price feeder config to support CRO.