fix(isMobilePhone.js): regex for Belgium locale (#1746)

* Updating regex of Belgium and the valid and invalid phone numbers in validators.js

* Fixing accidental deletion of closing braces

* Fixing the test numbers for fr-BE (french Belgium) too in validators.js since phone number rules will be same for that too

Co-authored-by: Divik Shrivastava <divik.s@safe.security>

src/lib/isMobilePhone.js

@@ -95,7 +95,7 @@ const phones = {
   'mz-MZ': /^(\+?258)?8[234567]\d{7}$/,
   'nb-NO': /^(\+?47)?[49]\d{7}$/,
   'ne-NP': /^(\+?977)?9[78]\d{8}$/,
-  'nl-BE': /^(\+?32|0)4?\d{8}$/,
+  'nl-BE': /^(\+?32|0)4\d{8}$/,
   'nl-NL': /^(((\+|00)?31\(0\))|((\+|00)?31)|0)6{1}\d{8}$/,
   'nn-NO': /^(\+?47)?[49]\d{7}$/,
   'pl-PL': /^(\+?48)? ?[5-8]\d ?\d{3} ?\d{2} ?\d{2}$/,

test/validators.js

@@ -7428,9 +7428,9 @@ describe('Validators', () => {
           '0470123456',
           '+32470123456',
           '32470123456',
-          '021234567',
-          '+3221234567',
-          '3221234567',
+          '0421234567',
+          '+32421234567',
+          '32421234567',
         ],
         invalid: [
           '12345',
@@ -7442,6 +7442,9 @@ describe('Validators', () => {
           '0212345678',
           '+320212345678',
           '320212345678',
+          '021234567',
+          '+3221234567',
+          '3221234567',
         ],
       },
       {
@@ -7450,9 +7453,9 @@ describe('Validators', () => {
           '0470123456',
           '+32470123456',
           '32470123456',
-          '021234567',
-          '+3221234567',
-          '3221234567',
+          '0421234567',
+          '+32421234567',
+          '32421234567',
         ],
         invalid: [
           '12345',
@@ -7464,6 +7467,9 @@ describe('Validators', () => {
           '0212345678',
           '+320212345678',
           '320212345678',
+          '021234567',
+          '+3221234567',
+          '3221234567',
         ],
       },
       {