Bump unicode gem (#104)

Author: andreibondarev

Gemfile.lock

@@ -279,7 +279,7 @@ GEM
     to_bool (2.0.0)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
-    unicode (0.4.4.4)
+    unicode (0.4.4.5)
     unicode-display_width (2.5.0)
     webrick (1.8.1)
     websocket-driver (0.7.6)