function getPaddedBufferSize( bufferSize ) {

	return Math.ceil( bufferSize / 4 ) * 4;

}
Get the required size + padding for a buffer, rounded to the next 4-byte boundary.
https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#data-alignment

@private
@param {number} bufferSize The size the original buffer. Should be an integer.
@returns {number} new buffer size with required padding as an integer.