use lodash cloneDeep to clone parsed body

[Sean-Y-X]

JSON.parse(JSON.stringify()) is a bad way to clone objects.

There are many reasons why it is bad. For example: why-json-parse-json-stringify-is-a-bad-practice-to-clone-an-object-in-javascript

I understand this method can be overridden but I don't think we should use a flawed approach as the default.

[apollo-cla]

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[Sean-Y-X]

@trevor-scheer thanks for your suggestions!