Add Filter Generic.

[alisajadih]

It's better to have a generic for filters. it's common to have same key in Filter and TData but different value types. and react table does not care about filterValue now.

types:

interface Data {
    timestamp: number
}

interface Filter {
   timestamp : {
      from : number,
      to : number
   }
}

problem:

export const columns : Column<Data> = [
{
  accessor : 'timestamp',
  Cell: () => //render some component base on inferred value that is `number`. It's Okay,
  Filter: ({column}) => // `column.filterValue` has `any` type and we can not check that we pass value to correct component. and also 
  //we don't have auto complete for value.
}
]

needed api :

export const columns : Column<Data,Filter> = [
{
  accessor : 'timestamp',
  Cell: () => <div></div>
  Filter: ({column}) => <input value={column.filterValue} /> // typescript will be unhappy here because `filterValue` is object.
}
]