Can't filter objects

Thanks very much for creating this library.
In my code, one of the columns receives an array of objects. I use customBodyRender to render the data as desired, problem is neither filtering nor searching works on this column because it parses the data as [Object object]. I tried converting the object property I want to display into an array of strings and I can't still filter nor search that column. I tried [this example](https://github.com/gregnb/mui-datatables/blob/master/examples/array-value-columns/index.js) and the app crashes with the error "Objects can't be React children...".

## Expected Behavior
Whether I pass an object or an array of strings, I should be able to filter and search that column.

## Current Behavior
Dropdown filter only shows [Object object] or blank.

## Steps to Reproduce (for bugs)
My data structure looks like this:
```
schools: [
{name: Ridgemont High, id: 1},
{name: Newport High, id: 2}
]
```

The code for the column is:
```
{
name: "schools",
label: "SCHOOL",
options: {
customBodyRender: (value, tableMeta) => {
return (value.map(school => {
return

{school.name}

}))
}
}
}
```

## Your Environment

| Tech | Version |
|--------------|---------|
| Material-UI | 4.3.0 |
| MUI-datatables | 2.6.4 |
| React | 16.8.0 |
| browser | Firefox |
| etc | |