add formData to ArrayFieldTemplate props (rjsf-team#645)

Author: olzraiti

README.md

@@ -850,6 +850,7 @@ The following props are passed to each `ArrayFieldTemplate`:
 - `uiSchema`: The uiSchema object for this array field.
 - `title`: A string value containing the title for the array.
 - `formContext`: The `formContext` object that you passed to Form.
+- `formData`: The formData for this array.
 
 The following props are part of each element in `items`:
 

src/components/fields/ArrayField.js

@@ -340,6 +340,7 @@ class ArrayField extends Component {
  title,
  TitleField,
  formContext,
+ formData,
  };
 
  // Check if a custom render function was passed in