chore(package): update semistandard to version 11.0.0 (#17)

https://greenkeeper.io/

Author: greenkeeper[bot]

Diff for: package.json

@@ -74,7 +74,7 @@
     "jsonwebtoken": "^7.1.9",
     "mocha": "^3.1.2",
     "rimraf": "^2.5.4",
-    "semistandard": "^10.0.0",
+    "semistandard": "^11.0.0",
     "sinon": "^2.1.0",
     "sinon-chai": "^2.8.0"
   }