Fixed lint errors.

package.json

@@ -102,6 +102,11 @@
         "experimentalObjectRestSpread": true,
         "jsx": true
       }
+    },
+    "settings": {
+      "react": {
+        "version": "detect"
+      }
     }
   },
   "devDependencies": {

src/components/layers/LayerIdBlock.jsx

@@ -10,6 +10,7 @@ class LayerIdBlock extends React.Component {
     value: PropTypes.string.isRequired,
     wdKey: PropTypes.string.isRequired,
     onChange: PropTypes.func.isRequired,
+    error: PropTypes.object.isRequired,
   }
 
   render() {