Update dev-dependencies

Author: wooorm

package.json

@@ -54,7 +54,7 @@
     "tsd": "^0.14.0",
     "type-coverage": "^2.0.0",
     "typescript": "^4.0.0",
-    "xo": "^0.38.0"
+    "xo": "^0.40.0"
   },
   "scripts": {
     "prepack": "npm run build && npm run format",
@@ -75,9 +75,9 @@
   "xo": {
     "prettier": true,
     "rules": {
-      "import/no-mutable-exports": "off",
       "no-var": "off",
-      "prefer-arrow-callback": "off"
+      "prefer-arrow-callback": "off",
+      "unicorn/prefer-node-protocol": "off"
     }
   },
   "remarkConfig": {