chore(package): update snazzy to version 7.1.0 (#736)

Author: greenkeeper[bot]

package.json

@@ -55,7 +55,7 @@
   "devDependencies": {
     "babel-eslint": "^8.0.1",
     "rimraf": "^2.5.4",
-    "snazzy": "^6.0.0",
+    "snazzy": "^7.1.0",
     "standard": "^11.0.0",
     "updtr": "^2.0.0"
   },