Update @types/unist

Author: wooorm

package.json

@@ -47,7 +47,7 @@
     "index.js"
   ],
   "dependencies": {
-    "@types/unist": "^2.0.0",
+    "@types/unist": "^3.0.0",
     "css-selector-parser": "^2.0.0",
     "devlop": "^1.1.0",
     "nth-check": "^2.0.0",