fix: remove website-generator from prepublishOnly (#126)

website-generator is only needed for gh-pages deployment,
not for npm publishing. This script was causing publish failures
because it requires --output-dir flag and dependencies.

Author: azu

packages/textchecker-element/package.json

@@ -41,8 +41,8 @@
     "build:public-lib-backward-compat": "cp public-dist/textchecker-element.esm.js public-dist/textchecker-element.es.js",
     "clean": "rimraf lib/",
     "prettier": "prettier --write \"**/*.{js,jsx,ts,tsx,css}\"",
-    "website-generator": "textlint-website-generator",
-    "prepublishOnly": "npm run build:public-lib && npm run build && npm run website-generator",
+    "website-generator": "node ../@textlint/website-generator/bin/cmd.js",
+    "prepublishOnly": "npm run build:public-lib && npm run build",
     "watch": "tsc -p . --watch"
   },
   "prettier": {