Bump unicorn

Gemfile

@@ -10,7 +10,7 @@ gem "responders", "2.4.1"
 
 # Appserver
 
-gem "unicorn", "5.4.1", require: false
+gem "unicorn", "5.5.0", require: false
 gem "unicorn-worker-killer", "0.4.4"
 
 # Federation

Gemfile.lock

@@ -726,7 +726,7 @@ GEM
       unf_ext
     unf_ext (0.0.7.5)
     unicode-display_width (1.4.0)
-    unicorn (5.4.1)
+    unicorn (5.5.0)
       kgio (~> 2.6)
       raindrops (~> 0.7)
     unicorn-worker-killer (0.4.4)
@@ -899,7 +899,7 @@ DEPENDENCIES
   twitter-text (= 1.14.7)
   typhoeus (= 1.3.1)
   uglifier (= 4.1.19)
-  unicorn (= 5.4.1)
+  unicorn (= 5.5.0)
   unicorn-worker-killer (= 0.4.4)
   uuid (= 2.3.9)
   versionist (= 1.7.0)