GetuUtils has Uppercase/Capital letter?

Added this simple function to provide better password validation using GetUtils
With this you can validate a password field combining:
GetUtils.isnumericOnly(string) & GetUtils.isAlphabetOnly(string) & GetUtils.isLengthGreaterOrEqual(string);

Thank you very much.

@@ -94,6 +94,9 @@ class GetUtils {
 
   /// Checks if string consist only Alphabet. (No Whitespace)
   static bool isAlphabetOnly(String s) => hasMatch(s, r'^[a-zA-Z]+$');
+  
+  /// Checks if string contains at least one Capital Letter
+  static bool hasCapitalletter(String s) => hasMatch(s, r'[A-Z]');
 
   /// Checks if string is boolean.
   static bool isBool(String value) {