package: use standard 4.0.0

Author: dcousens

package.json

@@ -13,7 +13,7 @@
   "devDependencies": {
     "buffer": "~2.3.2",
     "hash-test-vectors": "^1.3.1",
-    "standard": "^3.11.1",
+    "standard": "^4.0.0",
     "tape": "~2.3.2",
     "typedarray": "0.0.6"
   },