Update dependency jest to v24.9.0 (#404)

Author: renovate[bot]

package.json

@@ -23,7 +23,7 @@
   },
   "devDependencies": {
     "dev-null-stream": "0.0.1",
-    "jest": "24.8.0",
+    "jest": "24.9.0",
     "markdown-toc": "1.2.0",
     "prettier": "1.18.2"
   },