chore(deps): update dependency @types/node to v8.5.6

Author: renovate-bot

package.json

@@ -26,7 +26,7 @@
   "homepage": "https://github.com/graphcool/graphql-cli-voyager#readme",
   "devDependencies": {
     "@types/graphql": "0.11.7",
-    "@types/node": "8.5.5",
+    "@types/node": "8.5.6",
     "tslint": "5.8.0",
     "tslint-config-standard": "7.0.0",
     "typescript": "2.6.2"

yarn.lock

@@ -42,9 +42,9 @@
   version "4.14.91"
   resolved "https://registry.yarnpkg.com/@types/lodash/-/lodash-4.14.91.tgz#794611b28056d16b5436059c6d800b39d573cd3a"
 
-"@types/[email protected].5":
-  version "8.5.5"
-  resolved "https://registry.yarnpkg.com/@types/node/-/node-8.5.5.tgz#6f9e8164ae1a55a9beb1d2571cfb7acf9d720c61"
+"@types/[email protected].6":
+  version "8.5.6"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-8.5.6.tgz#5cf96a225c7be86f72d3dde03c41399319bb8bdc"
 
 accepts@^1.3.0, accepts@~1.3.3:
   version "1.3.3"