Update README.md with new mapping config

Author: kobylynskyi

README.md

@@ -12,16 +12,19 @@ Please refer to:
 
 ## Supported Options
 
-| Key                     | Data Type          | Default value | Description |
-| ----------------------- | ------------------ | ------------- | ----------- |
-| graphqlSchemaPaths      | List(String)       | None          | GraphQL schema locations. You can supply multiple paths to GraphQL schemas. |
-| packageName             | String             | Empty         | Java package for generated classes. |
-| outputDir               | String             | None          | The output target directory into which code will be generated. |
-| customTypesMapping      | Map(String,String) | Empty         | Can be used to supply custom mappings for scalars. <br/> Supports:<br/> * Map of (GraphqlObjectName.fieldName) to (JavaType) <br/> * Map of (GraphqlType) to (JavaType) |
-| modelNamePrefix         | String             | Empty         | Sets the prefix for GraphQL model classes (type, input, interface, enum, union). |
-| modelNameSuffix         | String             | Empty         | Sets the suffix for GraphQL model classes (type, input, interface, enum, union). |
-| apiPackage              | String             | Empty         | Java package for generated api classes (Query, Mutation, Subscription). |
-| modelPackage            | String             | Empty         | Java package for generated model classes (type, input, interface, enum, union). |
+| Key                       | Data Type          | Default value                         | Description |
+| ------------------------- | ------------------ | ------------------------------------- | ----------- |
+| graphqlSchemaPaths        | List(String)       | None                                  | GraphQL schema locations. You can supply multiple paths to GraphQL schemas. |
+| packageName               | String             | Empty                                 | Java package for generated classes. |
+| outputDir                 | String             | None                                  | The output target directory into which code will be generated. |
+| apiPackage                | String             | Empty                                 | Java package for generated api classes (Query, Mutation, Subscription). |
+| modelPackage              | String             | Empty                                 | Java package for generated model classes (type, input, interface, enum, union). |
+| generateApis              | Boolean            | True                                  | Java package for generated model classes (type, input, interface, enum, union). |
+| customTypesMapping        | Map(String,String) | Empty                                 | Can be used to supply custom mappings for scalars. <br/> Supports:<br/> * Map of (GraphqlObjectName.fieldName) to (JavaType) <br/> * Map of (GraphqlType) to (JavaType) |
+| customAnnotationsMapping  | Map(String,String) | Empty                                 | Can be used to supply custom annotations (serializers) for scalars. <br/> Supports:<br/> * Map of (GraphqlObjectName.fieldName) to (JavaType) <br/> * Map of (GraphqlType) to (JavaType) |
+| modelValidationAnnotation | String             | @javax.validation.constraints.NotNull | Annotation for mandatory (NonNull) fields. Can be null/empty. |
+| modelNamePrefix           | String             | Empty                                 | Sets the prefix for GraphQL model classes (type, input, interface, enum, union). |
+| modelNameSuffix           | String             | Empty                                 | Sets the suffix for GraphQL model classes (type, input, interface, enum, union). |
 
 
 ### Inspired by