Update dev-dependencies

Author: wooorm

Diff for: package.json

@@ -27,7 +27,6 @@
   "files": [
     "index.js"
   ],
-  "dependencies": {},
   "devDependencies": {
     "browserify": "^17.0.0",
     "nyc": "^15.0.0",
@@ -36,7 +35,7 @@
     "remark-preset-wooorm": "^8.0.0",
     "tape": "^5.0.0",
     "tinyify": "^3.0.0",
-    "xo": "^0.35.0"
+    "xo": "^0.38.0"
   },
   "scripts": {
     "format": "remark . -qfo && prettier . -w --loglevel warn && xo --fix",