[Issue]: isNumber ignores javascript values: -Infinity & Infinity and returns false

[rehman-00001]

Couple of issues I encountered when using this library in my project:

isNumber - returns false for javascript numeric values: -Infinity & Infinity and for numbers created using new Number(..) wrapper;

isBoolean & isString returns false for objects created using new keywords.
i.e., new String('asdf') & new Boolean()

@flexdinesh, please let me know if this need to be handled