Incorrect message type for proposal messages

[ryanchristo]

This issue tracks updating the api package to a telescope version that includes a fix for https://github.com/osmosis-labs/telescope/issues/321. This issue was encountered in relation to group proposal messages not returning the expected type.

The current workaround is the following:

messages: sdkProposal.messages.map((msg: any) => ({
  typeUrl: msg['@type'],
  value: msg,
} as Any))