Update xo

Author: wooorm

package.json

@@ -38,7 +38,7 @@
     "remark-cli": "^2.0.0",
     "remark-preset-wooorm": "^1.0.0",
     "tape": "^4.0.0",
-    "xo": "^0.16.0"
+    "xo": "^0.17.1"
   },
   "scripts": {
     "build-md": "remark . --quiet --frail",