Added the react-is package

Author: Andrei Toma

package.json

@@ -68,6 +68,7 @@
     "prettier": "1.18.2",
     "react": "16.11.0",
     "react-dom": "16.11.0",
+    "react-is": "^16.11.0",
     "react-test-renderer": "16.11.0",
     "rollup": "1.26.3",
     "rollup-plugin-babel": "4.3.3",