fix: set the state parameter to true while querying a channel

[devinwang]

Submit a pull request

CLA

• I have signed the Stream CLA (required).
• The code changes follow best practices
• Code changes are tested (add some information if not applicable)

Description of the pull request

Hey there,

I noticed that this Golang library doesn't assign the true value to the State parameter when the client queries channel information, which causes empty messages to be returned. I added this patch to ensure that Golang behaves the same as the NodeJS and Python libraries.

Thank you!