Upgrade various minor gems

Gemfile.lock

@@ -45,7 +45,7 @@ GEM
       activerecord (>= 3.0)
     addressable (2.5.0)
       public_suffix (~> 2.0, >= 2.0.2)
-    airbrussh (1.1.2)
+    airbrussh (1.3.0)
       sshkit (>= 1.6.1, != 1.7.0)
     arel (6.0.4)
     ast (2.3.0)
@@ -57,15 +57,15 @@ GEM
     builder (3.2.3)
     byebug (9.0.6)
     cancancan (2.0.0)
-    capistrano (3.8.0)
+    capistrano (3.8.2)
       airbrussh (>= 1.0.0)
       i18n
       rake (>= 10.0.0)
       sshkit (>= 1.9.0)
     capistrano-bundler (1.2.0)
       capistrano (~> 3.1)
       sshkit (~> 1.2)
-    capistrano-rails (1.2.3)
+    capistrano-rails (1.3.0)
       capistrano (~> 3.1)
       capistrano-bundler (~> 1.1)
     capistrano-rvm (0.1.2)
@@ -346,7 +346,7 @@ GEM
       activesupport (>= 3.0)
       sprockets (>= 2.8, < 4.0)
     sqlite3 (1.3.13)
-    sshkit (1.13.0)
+    sshkit (1.14.0)
       net-scp (>= 1.1.2)
       net-ssh (>= 2.8.0)
     therubyracer (0.12.3)