Document disableParentheses option

Author: ArtyomVancyan

README.md

@@ -87,6 +87,7 @@ Apart from the phone-specific properties described below, all [Input](https://mu
 | searchNotFound     | The value is shown if `enableSearch` is `true` and the query does not match any country. Default value is `No country found`. | string                    |
 | searchPlaceholder  | The value is shown if `enableSearch` is `true`. Default value is `Search country`.                                            | string                    |
 | disableDropdown    | Disables the manual country selection through the dropdown menu.                                                              | boolean                   |
+| disableParentheses | Disables parentheses from the input masks. Default enabled.                                                                   | boolean                   |
 | onlyCountries      | Country codes to be included in the list. E.g. `onlyCountries={['us', 'ca', 'uk']}`.                                          | string[]                  |
 | excludeCountries   | Country codes to be excluded from the list of countries. E.g. `excludeCountries={['us', 'ca', 'uk']}`.                        | string[]                  |
 | preferredCountries | Country codes to be at the top of the list. E.g. `preferredCountries={['us', 'ca', 'uk']}`.                                   | string[]                  |