fix(isPostalCode): fix overly permissive IR regexp (#2136)

* fix(isPostalCode): fix overly permissive IR regexp

replace "word boundary" anchor `\b` with start/end of line anchors `^` / `$`, to fix this

fixes #2135

* test(validators): add invalid tests for isPostalCode locale IR

Author: pano9000

src/lib/isPostalCode.js

@@ -37,7 +37,7 @@ const patterns = {
   IE: /^(?!.*(?:o))[A-Za-z]\d[\dw]\s\w{4}$/i,
   IL: /^(\d{5}|\d{7})$/,
   IN: /^((?!10|29|35|54|55|65|66|86|87|88|89)[1-9][0-9]{5})$/,
-  IR: /\b(?!(\d)\1{3})[13-9]{4}[1346-9][013-9]{5}\b/,
+  IR: /^(?!(\d)\1{3})[13-9]{4}[1346-9][013-9]{5}$/,
   IS: threeDigit,
   IT: fiveDigit,
   JP: /^\d{3}\-\d{4}$/,

test/validators.js

@@ -11471,6 +11471,9 @@ describe('Validators', () => {
           '43516 6456',
           '123443516 6456',
           '891123',
+          'test 4351666456',
+          '4351666456 test',
+          'test 4351666456 test',
         ],
       },
       {