fix(package): update eslint-plugin-react to version 7.20.0

Author: greenkeeper[bot]

package.json

@@ -35,7 +35,7 @@
     "babel-eslint": "10.1.0",
     "eslint-config-airbnb": "18.1.0",
     "eslint-plugin-jsx-a11y": "6.2.3",
-    "eslint-plugin-react": "7.19.0",
+    "eslint-plugin-react": "7.20.0",
     "eslint-plugin-react-hooks": "2.5.1"
   }
 }