chore(twitter): add title

Author: azu

README.md

@@ -18,7 +18,7 @@ Twitterのハッシュタグは[#js_plugin_book](https://twitter.com/search?f=tw
 
 <!-- textlint-disable -->
 
-<a href="https://twitter.com/share" class="twitter-share-button" data-size="large" data-hashtags="js_plugin_book" data-dnt="true">Tweet</a>
+<a href="https://twitter.com/share" class="twitter-share-button" data-text="JavaScript Plugin Architecture" data-size="large" data-hashtags="js_plugin_book" data-dnt="true">Tweet</a>
 <script>!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0],p=/^http:/.test(d.location)?'http':'https';if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src=p+'://platform.twitter.com/widgets.js';fjs.parentNode.insertBefore(js,fjs);}}(document, 'script', 'twitter-wjs');</script>
 <a href="http://b.hatena.ne.jp/entry/https://github.com/azu/JavaScript-Plugin-Architecture" class="hatena-bookmark-button" data-hatena-bookmark-title="JavaScript Plugin Architecture" data-hatena-bookmark-layout="standard-balloon" data-hatena-bookmark-lang="ja" title="はてなブックマークに追加"><img src="https://b.st-hatena.com/images/entry-button/button-only@2x.png" alt="はてなブックマークに追加" width="20" height="20" style="border: none;" /></a><script type="text/javascript" src="https://b.st-hatena.com/js/bookmark_button.js" charset="utf-8" async="async"></script>