test(npm): add mocha to npm test

Author: azu

Diff for: ja/jQuery/README.md

@@ -13,4 +13,4 @@ jQueryでは`$.fn`を拡張する事で、`$()`の返り値であるjQueryオブ
 <script src="greenify.js"></script>
 ```
 
-## どういう仕組み?fea
+## どういう仕組み?

Diff for: package.json

@@ -24,7 +24,7 @@
     "eslint": "eslint src/**/*.js",
     "eslint:md": "eslint --ext .md ja/**/*.md",
     "textlint": "summary-to-path | xargs textlint --rule spellcheck-tech-word",
-    "test": "npm run textlint && npm run eslint:md && npm run eslint && npm run build"
+    "test": "mocha --recursive && npm run textlint && npm run eslint:md && npm run eslint && npm run build"
   },
   "keywords": [
     "plugin",