Update dependency @types/acorn to v4.0.5 (#152)

Author: renovate-bot

package.json

@@ -35,7 +35,7 @@
     "temp-write": "3.4.0"
   },
   "devDependencies": {
-    "@types/acorn": "4.0.4",
+    "@types/acorn": "4.0.5",
     "@types/estree": "0.0.39",
     "@types/temp-write": "3.3.0",
     "ava": "1.2.1",