…tation objects)

A TypedArray representation object has two properties: `dtype` and `data`.

`dtype` is a string indicating the type of the typed array (`'int8'`, `'float32'`, `'uint16'`, etc.)

`data` is a primitive JavaScript object that stores the typed array data. It can be one of:
 - Standard JavaScript Array
 - ArrayBuffer
 - DataView
 - A base64 encoded string

The representation objects may stand in for TypedArrays in `data_type` properties and in properties with `arrayOk: true`.

The representation object is stored in `data`/`layout`, while the converted TypedArray is stored in `_fullData`/`_fullLayout`

 - Use `Lib.isPlainObject`
 - Renamed `data` -> `value`
 - Added `Uint8ClampedArray`
 - Committed updated package-lock.json

No changes yet to the logical structure of where conversion happens

Revert changes to coerce.js

In this case the decoded value is undefined, but an error won't be
thrown.

This can't be a mock anymore because it is not valid as input to
Plotly.plot without first passing through Plotly.decode

This function inputs a Plotly object and outputs a copy where all
TypedArray instances have been replace with JSON serializable
representation objects.  This function is the inverse of Plotly.decode