chore(deps): update dependency @types/node to v9.4.7

Author: renovate-bot

package.json

@@ -22,7 +22,7 @@
   },
   "devDependencies": {
     "@types/graphql": "0.12.4",
-    "@types/node": "9.4.6",
+    "@types/node": "9.4.7",
     "typescript": "2.7.2"
   },
   "repository": {

yarn.lock

@@ -6,7 +6,11 @@
   version "0.12.4"
   resolved "https://registry.yarnpkg.com/@types/graphql/-/graphql-0.12.4.tgz#d43bb55d45c6de0178bbd11dd59d04fd42138d94"
 
-"@types/node@9.4.6", "@types/node@^9.4.6":
+"@types/node@9.4.7":
+  version "9.4.7"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-9.4.7.tgz#57d81cd98719df2c9de118f2d5f3b1120dcd7275"
+
+"@types/node@^9.4.6":
   version "9.4.6"
   resolved "https://registry.yarnpkg.com/@types/node/-/node-9.4.6.tgz#d8176d864ee48753d053783e4e463aec86b8d82e"