Log Message:
mikutter: update to 3.9.4.

Upstream changes:

mikutter 3.9.4

* remove unnecessary debug outputs
* crash on opening an edit window of extract conditions when some
  extract conditions don't exist
* gtk2 3.3.7
* incorrect text range on copying selected region of tweet with URL
* refer to description on extracting texts
 * thanks Shibafu Midorino