type definition of Client4 don't match api definition

[marknelissen]

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Summary

type definition of Client4 don't match api definition on api.mattermost.com

Environment Information

• Webapp or React Native app: Webapp
• Mattermost-redux Version: 5.18.0

Steps to reproduce

Try to make use of the createPost function with a structure only containing:

• channel_id
• message
• props

This is only one example. Another is the mandatory timestamp attribute for the getFileThumbnailUrl and getFileUrl, while neither according to the documentation, nor the javascript code make it mandatory.

Expected behavior

Post creation endpoint is invoked.

Observed behavior

The code cannot compile since it expects a full post object, including all the date fields (create, update, ...)

Possible fixes

Revert to typing of 5.17.0.