Switch from package deep-equals to react-jsonschema-form native implementation

[mavarazy]

Live testing showed, that deep-equal package does not compare functions in desired way, since react-jsonschema-form uses functions to customize view, in many cases deep-equals will show content changed, although it did not.
It's better to fallback to react-jsonschema-form native implementation in lib/utils package, with
import { deepEquals } from "react-jsonschema-form/lib/utils";