resizable options should be an object

[lucianocutone]

GridStackOptions define property resizable of type boolean but the interface IGridstackOptions define same property in this way:
/**
* allows to override jQuery UI resizable options. (default: { autoHide: true, handles: 'se' })
*/
resizable?: {};

I tried to force to assign an object in this way:
this.options.resizable = {autoHide: true, handles: 'e, se, s, sw, w'};

and change resizable from resizable: boolean; to resizable: {}; in GridStackOptions.
It works but, rightly, does not compile.