Update String/CheckPascalCase.js

Co-authored-by: Rak Laptudirm <[email protected]>

String/CheckPascalCase.js

@@ -10,7 +10,7 @@
 const CheckPascalCase = (VarName) => {
   // firstly, check that input is a string or not.
   if (typeof VarName !== 'string') {
-    return 'Not string(s)'
+    return new TypeError("Argument is not a string.")
   }
 
   const pat = /^[A-Z][A-Za-z]*$/