fix: add @Shinigami92's suggestion (change error to FakerError)

Author: ejcheng

src/finance.ts

@@ -303,7 +303,7 @@ export class Finance {
    */
   pin(length: number = 4): string {
     if (length < 1) {
-      throw new Error('minimum length is 1');
+      throw new FakerError('minimum length is 1');
     }
     return Array.from({ length }, () => this.faker.datatype.number(9)).join('');
   }