Update WanaKana to v4.0.2

Resolves #290

README.md

@@ -259,7 +259,7 @@ versions packaged.
 *   Handlebars: [homepage](https://handlebarsjs.com/) - [snapshot](http://builds.handlebarsjs.com.s3.amazonaws.com/handlebars.min-714a4c4.js) - [license](https://github.com/wycats/handlebars.js/blob/v4.0.6/LICENSE)
 *   jQuery: [homepage](https://blog.jquery.com/) - [snapshot](https://code.jquery.com/jquery-3.2.1.min.js) - [license](https://github.com/jquery/jquery/blob/3.2.1/LICENSE.txt)
 *   JSZip: [homepage](https://stuk.github.io/jszip/) - [snapshot](https://raw.githubusercontent.com/Stuk/jszip/de7f52fbcba485737bef7923a83f0fad92d9f5bc/dist/jszip.min.js) - [license](https://github.com/Stuk/jszip/blob/v3.1.3/LICENSE.markdown)
-*   WanaKana: [homepage](https://wanakana.com/) - [snapshot](https://raw.githubusercontent.com/WaniKani/WanaKana/7c4a052/gh-pages/assets/js/wanakana.min.js) - [license](https://github.com/WaniKani/WanaKana/blob/2.2.3/LICENSE)
+*   WanaKana: [homepage](https://wanakana.com/) - [snapshot](https://unpkg.com/wanakana@4.0.2/umd/wanakana.min.js) - [license](https://github.com/WaniKani/WanaKana/blob/4.0.2/LICENSE)
 
 ## Frequently Asked Questions ##
 

ext/bg/legal.html

@@ -44,7 +44,7 @@ and are used in conformance with the Group's <a href="https://www.edrdg.org/edrd
                 <li><a href="https://github.com/wycats/handlebars.js/blob/v4.0.6/LICENSE" target="_blank" rel="noopener">Handlebars v4.0.6</a></li>
                 <li><a href="https://github.com/jquery/jquery/blob/3.2.1/LICENSE.txt" target="_blank" rel="noopener">jQuery v3.2.1</a></li>
                 <li><a href="https://github.com/Stuk/jszip/blob/v3.1.3/LICENSE.markdown" target="_blank" rel="noopener">JSZip v3.1.3</a></li>
-                <li><a href="https://github.com/WaniKani/WanaKana/blob/2.2.3/LICENSE" target="_blank" rel="noopener">WanaKana v2.2.3</a></li>
+                <li><a href="https://github.com/WaniKani/WanaKana/blob/4.0.2/LICENSE" target="_blank" rel="noopener">WanaKana v4.0.2</a></li>
             </ul>
         </div>
     </div>