Update gems.

Gemfile.lock

@@ -62,16 +62,16 @@ GEM
     binding_of_caller (0.7.2)
       debug_inspector (>= 0.0.1)
     builder (3.2.2)
-    bullet (5.0.0)
+    bullet (5.4.2)
       activesupport (>= 3.0.0)
-      uniform_notifier (~> 1.9.0)
-    byebug (8.2.1)
+      uniform_notifier (~> 1.10.0)
+    byebug (9.0.6)
     certified (1.0.0)
-    coderay (1.1.0)
+    coderay (1.1.1)
     concurrent-ruby (1.0.2)
     connection_pool (2.2.0)
     crass (1.0.2)
-    daemons (1.2.3)
+    daemons (1.2.4)
     debug_inspector (0.0.2)
     diff-lcs (1.2.5)
     discourse-qunit-rails (0.0.9)
@@ -96,7 +96,7 @@ GEM
     ember-source (1.12.2)
     erubis (2.7.0)
     eventmachine (1.2.0.1)
-    excon (0.45.4)
+    excon (0.53.0)
     execjs (2.7.0)
     exifr (1.2.4)
     fabrication (2.9.8)
@@ -164,7 +164,7 @@ GEM
     mini_portile2 (2.1.0)
     mini_racer (0.1.3)
       libv8 (~> 5.0)
-    minitest (5.9.0)
+    minitest (5.9.1)
     mocha (1.1.0)
       metaclass (~> 0.0.1)
     mock_redis (0.15.4)
@@ -175,9 +175,8 @@ GEM
     multipart-post (2.0.0)
     mustache (1.0.3)
     netrc (0.11.0)
-    nokogiri (1.6.8)
+    nokogiri (1.6.8.1)
       mini_portile2 (~> 2.1.0)
-      pkg-config (~> 1.1.7)
     nokogumbo (1.4.7)
       nokogiri
     oauth (0.4.7)
@@ -226,9 +225,8 @@ GEM
       redis
       ruby-openid
     pg (0.18.4)
-    pkg-config (1.1.7)
     progress (3.1.1)
-    pry (0.10.3)
+    pry (0.10.4)
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
@@ -236,7 +234,7 @@ GEM
       pry (>= 0.9.10, < 0.11.0)
     pry-rails (0.3.4)
       pry (>= 0.9.10)
-    puma (3.2.0)
+    puma (3.6.0)
     r2 (0.2.6)
     rack (1.6.4)
     rack-mini-profiler (0.10.1)
@@ -376,19 +374,19 @@ GEM
       actionpack (>= 4.0)
       activesupport (>= 4.0)
       sprockets (>= 3.0.0)
-    stackprof (0.2.9)
-    thin (1.6.4)
+    stackprof (0.2.10)
+    thin (1.7.0)
       daemons (~> 1.0, >= 1.0.9)
       eventmachine (~> 1.0, >= 1.0.4)
-      rack (~> 1.0)
+      rack (>= 1, < 3)
     thor (0.19.1)
     thread_safe (0.3.5)
-    tilt (2.0.2)
-    timecop (0.8.0)
+    tilt (2.0.5)
+    timecop (0.8.1)
     trollop (2.1.2)
     tzinfo (1.2.2)
       thread_safe (~> 0.1)
-    uglifier (3.0.0)
+    uglifier (3.0.2)
       execjs (>= 0.3.0, < 3)
     unf (0.1.4)
       unf_ext
@@ -396,7 +394,7 @@ GEM
     unicorn (5.1.0)
       kgio (~> 2.6)
       raindrops (~> 0.7)
-    uniform_notifier (1.9.0)
+    uniform_notifier (1.10.0)
 
 PLATFORMS
   ruby
@@ -503,4 +501,4 @@ DEPENDENCIES
   unicorn
 
 BUNDLED WITH
-   1.12.5
+   1.13.4