Problem

I had two problems when integrating the SDK into telemetrydeck-react. First, the d.ts file wasn't recognized by typescript, so I added the file manually to the types field of the package.json. After doing so, I noticed that the TelemetryDeckPayload type was missing.

What I did

I basically added the types field to your package.json referencing the telemetrydeck.d.ts that is generated and added a very basic typedef of the TelemetryDeckPayload type.
I also ran the prepublish command to test that my work was correct and saw the right payload type exported from the d.ts file.

export type TelemetryDeckPayload = {
    [x: string]: any;
};