chore(package): update react to version 16.8.3

Author: greenkeeper[bot]

package.json

@@ -36,7 +36,7 @@
     "jest": "^24.1.0",
     "lint-staged": "^8.1.4",
     "prettier": "^1.16.4",
-    "react": "16.8.2",
+    "react": "16.8.3",
     "react-dom": "16.8.2",
     "react-test-renderer": "16.8.2",
     "rxjs": "^6.4.0",