Setting column display option to a string resets component state

I am not 100% sure whether this is a bug with this project or I am doing something wrong with react hooks.

## Expected Behavior
Setting the column display property to a string should not reset state.

## Current Behavior
The component state is reset.

## Steps to Reproduce (for bugs)
https://codesandbox.io/s/mol243nzxj

Setting `display` to a string e.g. `"false"` instead of `false` will cause the state to be reset when changing the switch value.

1. Open the console window
2. Click a switch an observe that an array containing 4 objects is logged.
3. Change `display: true` to `display: "true"`.
4. Click a switch and observe that an empty array is logged and the table only contains one object.

## Your Environment

| Tech | Version |
|--------------|---------|
| Material-UI | 3.9.3 |
| MUI-datatables | 2.0.0-beta.59 |
| React | 16.8.6 |
| browser | Chrome Version 73.0.3683.103 (Official Build) (64-bit) |