feat(stream): removed echo type from emitted census messages type

[microwavekonijn]

Echo downgrades the CensusMessage type to any/unknown. This isn't ideal as it negates all type safety. Hence we exclude the echo type. The user can always override the type, like:

streamClient.on('message', (msg: Stream.CensusMessage) => {
  // Do something
});

Caution is still advised when implementing echo messages. Creating a custom types for any echo messages is highly recommended which can then be combined in a union with CensusMessageWithoutEcho message type.

[changeset-bot]

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Latest commit: d128d5b

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
ps2census	Minor

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