fix(prop-types): check for react components via PropTypes.elementType (#4025)

packages/netlify-cms-core/package.json

@@ -52,7 +52,7 @@
     "react-modal": "^3.8.1",
     "react-polyglot": "^0.7.0",
     "react-redux": "^7.2.0",
-    "react-router-dom": "^4.2.2",
+    "react-router-dom": "^5.2.0",
     "react-scroll-sync": "^0.8.0",
     "react-sortable-hoc": "^1.0.0",
     "react-split-pane": "^0.1.85",

packages/netlify-cms-core/src/components/Editor/EditorControlPane/Widget.js

@@ -52,7 +52,7 @@ export default class Widget extends Component {
     clearSearch: PropTypes.func.isRequired,
     clearFieldErrors: PropTypes.func.isRequired,
     queryHits: PropTypes.oneOfType([PropTypes.array, PropTypes.object]),
-    editorControl: PropTypes.func.isRequired,
+    editorControl: PropTypes.elementType.isRequired,
     uniqueFieldId: PropTypes.string.isRequired,
     loadEntry: PropTypes.func.isRequired,
     t: PropTypes.func.isRequired,
@@ -278,6 +278,7 @@ export default class Widget extends Component {
       parentIds,
       t,
     } = this.props;
+
     return React.createElement(controlComponent, {
       entry,
       collection,

packages/netlify-cms-widget-list/src/ListControl.js

@@ -101,7 +101,7 @@ export default class ListControl extends React.Component {
     classNameWrapper: PropTypes.string.isRequired,
     setActiveStyle: PropTypes.func.isRequired,
     setInactiveStyle: PropTypes.func.isRequired,
-    editorControl: PropTypes.func.isRequired,
+    editorControl: PropTypes.elementType.isRequired,
     resolveWidget: PropTypes.func.isRequired,
     clearFieldErrors: PropTypes.func.isRequired,
     fieldsErrors: ImmutablePropTypes.map.isRequired,

packages/netlify-cms-widget-markdown/src/MarkdownControl/index.js

@@ -20,7 +20,7 @@ export default class MarkdownControl extends React.Component {
     onAddAsset: PropTypes.func.isRequired,
     getAsset: PropTypes.func.isRequired,
     classNameWrapper: PropTypes.string.isRequired,
-    editorControl: PropTypes.func.isRequired,
+    editorControl: PropTypes.elementType.isRequired,
     value: PropTypes.string,
     field: ImmutablePropTypes.map.isRequired,
     getEditorComponents: PropTypes.func,

packages/netlify-cms-widget-object/src/ObjectControl.js

@@ -32,7 +32,7 @@ export default class ObjectControl extends React.Component {
     classNameWrapper: PropTypes.string.isRequired,
     forList: PropTypes.bool,
     controlRef: PropTypes.func,
-    editorControl: PropTypes.func.isRequired,
+    editorControl: PropTypes.elementType.isRequired,
     resolveWidget: PropTypes.func.isRequired,
     clearFieldErrors: PropTypes.func.isRequired,
     fieldsErrors: ImmutablePropTypes.map.isRequired,