Add the ability to explicitly specify the type for numeric data in JavaScript GLV

Now integer value can be serialized only as Int or Long, and users can't select type explicitly.
implementation

Add support for Byte and Short, allow so select type for any number, for example send 1 as Byte or Short or Int or Long or Double, etc.
 
Find a way to handle values outside [MIN_SAFE_INTEGER,MAX_SAFE_INTEGER].