Fix: correct French VAT (FR) validation regex and add tests (#2584)

Author: iamAmer

src/lib/isVAT.js

@@ -60,7 +60,7 @@ export const vatMatchers = {
   DK: str => /^(DK)?\d{8}$/.test(str),
   EE: str => /^(EE)?\d{9}$/.test(str),
   FI: str => /^(FI)?\d{8}$/.test(str),
-  FR: str => /^(FR)?\w{2}\d{9}$/.test(str),
+  FR: str => /^(FR)([A-Z0-9]{2}\d{9})$/.test(str),
   DE: str => /^(DE)?\d{9}$/.test(str),
   EL: str => /^(EL)?\d{9}$/.test(str),
   HU: str => /^(HU)?\d{8}$/.test(str),

test/validators.test.js

@@ -15055,11 +15055,18 @@ describe('Validators', () => {
       args: ['FR'],
       valid: [
         'FRAA123456789',
-        'AA123456789',
+        'FR83404833048',
+        'FR40123456789',
+        'FRA1123456789',
+        'FR1A123456789',
       ],
       invalid: [
         'FR AA123456789',
         '123456789',
+        'FRAA123456789A',
+        'FR123456789',
+        'FR 83404833048',
+        'FRaa123456789',
       ],
     });
     test({