fix(isEmail) do not allow non-breaking space in user part (#2237)

Co-authored-by: jpoole <jpoole@maxmind.com>

fixes #2218

Author: jeremy21212121

src/lib/isEmail.js

@@ -22,7 +22,7 @@ const splitNameAddress = /^([^\x00-\x1F\x7F-\x9F\cX]+)</i;
 const emailUserPart = /^[a-z\d!#\$%&'\*\+\-\/=\?\^_`{\|}~]+$/i;
 const gmailUserPart = /^[a-z\d]+$/;
 const quotedEmailUser = /^([\s\x01-\x08\x0b\x0c\x0e-\x1f\x7f\x21\x23-\x5b\x5d-\x7e]|(\\[\x01-\x09\x0b\x0c\x0d-\x7f]))*$/i;
-const emailUserUtf8Part = /^[a-z\d!#\$%&'\*\+\-\/=\?\^_`{\|}~\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]+$/i;
+const emailUserUtf8Part = /^[a-z\d!#\$%&'\*\+\-\/=\?\^_`{\|}~\u00A1-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]+$/i;
 const quotedEmailUserUtf8 = /^([\s\x01-\x08\x0b\x0c\x0e-\x1f\x7f\x21\x23-\x5b\x5d-\x7e\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]|(\\[\x01-\x09\x0b\x0c\x0d-\x7f\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))*$/i;
 const defaultMaxEmailLength = 254;
 /* eslint-enable max-len */

test/validators.test.js

@@ -66,6 +66,9 @@ describe('Validators', () => {
         '"wrong()[]",:;<>@@gmail.com',
         'username@domain.com�',
         'username@domain.com©',
+        'nbsp test@test.com',
+        'nbsp_test@te st.com',
+        'nbsp_test@test.co m',
       ],
     });
   });
@@ -117,6 +120,7 @@ describe('Validators', () => {
         'hans.m端ller@test.com',
         'z@co.c',
         'tüst@invalid.com',
+        'nbsp test@test.com',
       ],
     });
   });