Updated multiple gems.

Gemfile.lock

@@ -33,7 +33,7 @@ GIT
 
 GIT
   remote: git://github.com/rails/rails.git
-  revision: 3804d017333da16d76d9fc6633faf5635c7b03d7
+  revision: 22aec58a2565a76e0f55d05d045b7a45715c5bb9
   branch: 4-2-stable
   specs:
     actionmailer (4.2.10)
@@ -96,7 +96,7 @@ GEM
       multi_json (~> 1.11, >= 1.11.2)
       rack (>= 1.5.2, < 3)
       railties (>= 4.0)
-    airbrussh (1.3.0)
+    airbrussh (1.3.1)
       sshkit (>= 1.6.1, != 1.7.0)
     arel (6.0.4)
     base32 (0.3.2)
@@ -158,10 +158,10 @@ GEM
       railties (>= 3.2.0)
       sass-rails (>= 3.2.0)
     kgio (2.11.2)
-    loofah (2.2.2)
+    loofah (2.2.3)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
-    mail (2.7.0)
+    mail (2.7.1)
       mini_mime (>= 0.1.1)
     mime-types (3.2.2)
       mime-types-data (~> 3.2015)
@@ -177,8 +177,8 @@ GEM
     netrc (0.11.0)
     nokogiri (1.8.5)
       mini_portile2 (~> 2.3.0)
-    nokogumbo (1.5.0)
-      nokogiri
+    nokogumbo (2.0.0)
+      nokogiri (~> 1.8, >= 1.8.4)
     rack (1.6.10)
     rack-test (0.6.3)
       rack (>= 1.0)
@@ -207,10 +207,10 @@ GEM
       mime-types (>= 1.16, < 4.0)
       netrc (~> 0.8)
     ruby-graphviz (1.2.3)
-    sanitize (4.6.6)
+    sanitize (5.0.0)
       crass (~> 1.0.2)
-      nokogiri (>= 1.4.4)
-      nokogumbo (~> 1.4)
+      nokogiri (>= 1.8.0)
+      nokogumbo (~> 2.0)
     sass (3.6.0)
       sass-listen (~> 4.0.0)
     sass-listen (4.0.0)
@@ -230,7 +230,7 @@ GEM
       activesupport (>= 4.0)
       sprockets (>= 3.0.0)
     sqlite3 (1.3.13)
-    sshkit (1.17.0)
+    sshkit (1.18.0)
       net-scp (>= 1.1.2)
       net-ssh (>= 2.8.0)
     strip_attributes (1.8.0)