Support for chains that don't have "cosmos" as hrp for bech32 address

[andynog]

Crate

modules

Summary of Bug

Currently, if one of the chains configure on the relayer doesn't have an address starting with "cosmos" , the transactions will fail with a

conn init failed, error:  tx error: GRPC error: GRPC error: status: Unknown, message: "invalid Bech32 prefix; expected akash, got cosmos", details: [], metadata: MetadataMap { headers: {} }

I think this might have to do with this code since "cosmos" is hard-coded there https://github.com/informalsystems/ibc-rs/blob/db04e2468adc09551563b09cf137c872ba800df3/modules/src/address.rs#L11

Version

Steps to Reproduce

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[adizere]

Closing in favor of cosmos/ibc-rs#88.

[romac]

Fixed in #753