chore(package): update react-test-renderer to version 16.8.1

Author: greenkeeper[bot]

package.json

@@ -68,7 +68,7 @@
     "pretty-bytes": "^5.0.0",
     "react": "^16.8.1",
     "react-dom": "^16.8.1",
-    "react-test-renderer": "^16.5.2",
+    "react-test-renderer": "^16.8.1",
     "regenerator-runtime": "^0.12.0",
     "rollup": "^0.66.1",
     "rollup-plugin-babel": "^4.0.3",