Update dev-dependencies

Author: wooorm

package.json

@@ -30,7 +30,7 @@
   "devDependencies": {
     "browserify": "^16.0.0",
     "esmangle": "^1.0.1",
-    "hastscript": "^3.0.1",
+    "hastscript": "^4.0.0",
     "nyc": "^12.0.0",
     "prettier": "^1.13.5",
     "remark-cli": "^5.0.0",