chore(deps): update dependency @types/node to v8.5.8

Author: renovate-bot

package.json

@@ -22,7 +22,7 @@
   },
   "devDependencies": {
     "@types/graphql": "0.11.7",
-    "@types/node": "8.5.7",
+    "@types/node": "8.5.8",
     "typescript": "2.6.2"
   },
   "repository": {

yarn.lock

@@ -6,9 +6,9 @@
   version "0.11.7"
   resolved "https://registry.yarnpkg.com/@types/graphql/-/graphql-0.11.7.tgz#da39a2f7c74e793e32e2bb7b3b68da1691532dd5"
 
-"@types/node@8.5.7":
-  version "8.5.7"
-  resolved "https://registry.yarnpkg.com/@types/node/-/node-8.5.7.tgz#9c498c35af354dcfbca3790fb2e81129e93cf0e2"
+"@types/node@8.5.8":
+  version "8.5.8"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-8.5.8.tgz#92509422653f10e9c0ac18d87e0610b39f9821c7"
 
 "@types/zen-observable@0.5.3":
   version "0.5.3"