fix: throw error on invalid date

Author: luciferreeves

examples/browser/js/faker.js

@@ -74,6 +74,8 @@ export class Zodiac {
         return this.faker.definitions.zodiac.sign[10];
       } else if ((month === 12 && day > 21) || (month === 1 && day <= 20)) {
         return this.faker.definitions.zodiac.sign[11];
+      } else {
+        throw new Error('Invalid date');
       }
     }
   }