Merge pull request #502 from tinymce/feature/INT-3287

INT-3287: Add `readonly` prop as an overridden init prop

src/main/ts/components/Editor.tsx

@@ -15,7 +15,7 @@ export interface IProps {
   initialValue: string;
   onEditorChange: (a: string, editor: TinyMCEEditor) => void;
   value: string;
-  init: EditorOptions & { selector?: undefined; target?: undefined };
+  init: EditorOptions & Partial<Record<'selector' | 'target' | 'readonly', undefined>>;
   tagName: string;
   cloudChannel: string;
   plugins: NonNullable<EditorOptions['plugins']>;