Update constants.ts

Fixing Mexico mask. Number should have 10 digits after the country code

Author: AlejandroGomezE

src/PhoneInput/constants.ts

@@ -619,7 +619,7 @@ export const MASK_PER_COUNTRY: Partial<{
   MR: [/\d/, /\d/, '-', /\d/, /\d/, '-', /\d/, /\d/, /\d/, /\d/],
   MU: [/\d/, /\d/, /\d/, '-', /\d/, /\d/, /\d/, /\d/],
   YT: [/\d/, /\d/, /\d/, /\d/, /\d/, '-', /\d/, /\d/, /\d/, /\d/],
-  MX: [/\d/, /\d/, '-', /\d/, /\d/, '-', /\d/, /\d/, /\d/, /\d/],
+  MX: [/\d/, /\d/, /\d/, '-', /\d/, /\d/, /\d/, '-', /\d/, /\d/, /\d/, /\d/],
   FM: [/\d/, /\d/, /\d/, '-', /\d/, /\d/, /\d/, /\d/],
   MD: [/\d/, /\d/, /\d/, /\d/, '-', /\d/, /\d/, /\d/, /\d/],
   MC: [/\d/, /\d/, '-', /\d/, /\d/, /\d/, '-', /\d/, /\d/, /\d/],