README.md in ibandit-0.2.1 vs README.md in ibandit-0.3.0

@@ -54,9 +54,12 @@
 iban.errors                    # => { country_code: "'XQ' is not a valid..." }
 ```
 
 The following error keys may be set:
 - `country_code`
+- `bank_code`
+- `branch_code`
+- `account_number`
 - `check_digits`
 - `characters`
 - `length`
 - `format`