refactor(typeOf): remove the lowercase.

Author: sciborrudnicki

src/lib/type-of.func.ts

@@ -4,5 +4,5 @@
  * @returns {string} The return value is a `string` of the object class name.
  * @author https://javascript.plainenglish.io/the-best-way-to-type-check-in-vanilla-js-55197b4f45ec
  */
-export const typeOf = (value: any): string =>
-  Object.prototype.toString.call(value).slice(8, -1).toLowerCase();
+export const typeOf = (value: any): string => 
+  Object.prototype.toString.call(value).slice(8, -1);