style: format README with prettier

Author: NoNameProvided

README.md

@@ -374,7 +374,7 @@ let album = plainToClass(Album, albumJson);
 ### Providing more than one type option[⬆](#table-of-contents)
 
 In case the nested object can be of different types, you can provide an additional options object,
-that specifies a discriminator. The discriminator option must define a `property` that holds the subtype 
+that specifies a discriminator. The discriminator option must define a `property` that holds the subtype
 name for the object and the possible `subTypes` that the nested object can converted to. A sub type
 has a `value`, that holds the constructor of the Type and the `name`, that can match with the `property`
 of the discriminator.