chore(deps): update dependency @types/node to v9

package.json

@@ -18,7 +18,7 @@
   "devDependencies": {
     "@types/cheerio": "0.22.10",
     "@types/jest": "21.1.10",
-    "@types/node": "8.10.38",
+    "@types/node": "9.6.40",
     "@types/request": "2.48.1",
     "jest": "21.2.1",
     "jest-playback": "1.0.1",

yarn.lock

@@ -24,9 +24,9 @@
   version "10.12.10"
   resolved "https://registry.yarnpkg.com/@types/node/-/node-10.12.10.tgz#4fa76e6598b7de3f0cb6ec3abacc4f59e5b3a2ce"
 
-"@types/node@8.10.38":
-  version "8.10.38"
-  resolved "https://registry.yarnpkg.com/@types/node/-/node-8.10.38.tgz#e05c201a668492e534b48102aca0294898f449f6"
+"@types/node@9.6.40":
+  version "9.6.40"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-9.6.40.tgz#2d69cefbc090cb0bb824542a4c575b14dde7d3aa"
 
 "@types/request@2.48.1":
   version "2.48.1"