chore(deps): update dependency react-test-renderer to v16.8.6 (#510)

Author: renovate[bot]

package-lock.json

@@ -65,7 +65,7 @@
     "node-sass": "4.11.0",
     "po2json": "1.0.0-alpha",
     "postcss-loader": "3.0.0",
-    "react-test-renderer": "16.8.5",
+    "react-test-renderer": "16.8.6",
     "rimraf": "2.6.3",
     "sass-loader": "7.1.0",
     "style-loader": "0.23.1",