Log Message:
mikutter: update to 3.7.4.

Upstream changes:

mikutter 3.7.4

* change to get thumnails of gyazo via Twitter Card
 * thanks cob odo
* support quoted_tweet by perma_link for tweets with mobile.twitter.com
 * thanks cob odo
* use fileselect to choose a browser
 * thanks cob odo
* twitter: change character count method to using weighted length
 * Tweeting Made Easier
   \ 
https://blog.twitter.com/official/en_us/topics/product/2017/tweetingmadeeasier.html
* appease tons of Gdk-CRITICAL error messages
 * thanks ncaq net
* misc improvements of photo_support plugin
 * unify code to get images via og:image for OpenGraphProtocol (OGP)
 * also unify code to get images via OGP and via Twitter Card
 * support specification updates of Twitter Card
 * could not get Fotolog images
 * support marshmallow https://marshmallow-qa.com/ as an image hosting service
 * support peing https://peing.net/ja as an image hosting service
 * thanks cob odo