Update xo

Author: wooorm

index.test-d.ts

@@ -1,7 +1,7 @@
 import {Node} from 'unist'
 import {expectType, expectError} from 'tsd'
-import {filter} from './index.js'
 import {Heading} from 'mdast'
+import {filter} from './index.js'
 
 expectError(filter())
 expectType<Node | null>(filter({type: 'root'}))

package.json

@@ -49,7 +49,7 @@
     "type-coverage": "^2.0.0",
     "typescript": "^4.0.0",
     "unist-builder": "^3.0.0",
-    "xo": "^0.38.0"
+    "xo": "^0.42.0"
   },
   "scripts": {
     "prepack": "npm run build && npm run format",