Breaking change between v3.0.6 and v3.1.0

[fpeterdev]

The signature of the hot() and cold() functions changed between versions 3.0.6 and 3.1.0.

It changed from: cold(marbles: string, values?: any, error?: any): to: cold(marbles: string, values?: object, error?: object)

The any => object change can cause type errors