chore(deps): update dependency @types/node to v9.4.6

Author: renovate-bot

package.json

@@ -22,7 +22,7 @@
   },
   "devDependencies": {
     "@types/graphql": "0.12.3",
-    "@types/node": "9.4.5",
+    "@types/node": "9.4.6",
     "typescript": "2.7.1"
   },
   "repository": {

yarn.lock

@@ -6,9 +6,9 @@
   version "0.12.3"
   resolved "https://registry.yarnpkg.com/@types/graphql/-/graphql-0.12.3.tgz#c429585aaa4523135e0ab4e12dec72d2d913946f"
 
-"@types/node@9.4.5":
-  version "9.4.5"
-  resolved "https://registry.yarnpkg.com/@types/node/-/node-9.4.5.tgz#d2a90c634208173d1b1a0a6ba9f1df3de62edcf5"
+"@types/node@9.4.6":
+  version "9.4.6"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-9.4.6.tgz#d8176d864ee48753d053783e4e463aec86b8d82e"
 
 "@types/zen-observable@0.5.3":
   version "0.5.3"