chore(deps): update devDependencies

Author: azu

example/package.json

@@ -13,8 +13,8 @@
   "author": "azu",
   "license": "MIT",
   "devDependencies": {
-    "@textlint/website-generator": "^0.17.0",
-    "textlint": "^14.4.0"
+    "@textlint/website-generator": "^0.18.0",
+    "textlint": "^15.2.2"
   },
   "dependencies": {
     "textlint-rule-preset-jtf-style": "file:.."