bump rails_admin

Gemfile.lock

@@ -26,7 +26,7 @@ GEM
       thread_safe (~> 0.1)
       tzinfo (~> 0.3.37)
     arel (4.0.2)
-    atomic (1.1.15)
+    atomic (1.1.16)
     bcrypt-ruby (3.1.2)
     bootstrap-sass (2.3.2.2)
       sass (~> 3.2)
@@ -77,9 +77,9 @@ GEM
       mime-types (~> 1.16)
       treetop (~> 1.4.8)
     mime-types (1.25.1)
-    mini_portile (0.5.2)
+    mini_portile (0.5.3)
     minitest (4.7.5)
-    multi_json (1.9.0)
+    multi_json (1.9.2)
     mysql2 (0.3.14)
     nested_form (0.3.2)
     nokogiri (1.6.1)
@@ -100,7 +100,7 @@ GEM
       bundler (>= 1.3.0, < 2.0)
       railties (= 4.0.4)
       sprockets-rails (~> 2.0.0)
-    rails_admin (0.6.1)
+    rails_admin (0.6.2)
       builder (~> 3.1)
       coffee-rails (~> 4.0)
       font-awesome-rails (>= 3.0)
@@ -123,7 +123,7 @@ GEM
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
     raindrops (0.13.0)
-    rake (10.1.1)
+    rake (10.2.2)
     redcarpet (3.0.0)
     remotipart (1.2.1)
     rspec (2.14.1)
@@ -144,12 +144,13 @@ GEM
       rspec-mocks (~> 2.14.0)
     ruby-progressbar (1.2.0)
     safe_yaml (1.0.1)
-    sass (3.2.14)
-    sass-rails (4.0.1)
+    sass (3.2.18)
+    sass-rails (4.0.2)
       railties (>= 4.0.0, < 5.0)
-      sass (>= 3.1.10)
+      sass (~> 3.2.0)
+      sprockets (~> 2.8, <= 2.11.0)
       sprockets-rails (~> 2.0.0)
-    sprockets (2.12.0)
+    sprockets (2.11.0)
       hike (~> 1.2)
       multi_json (~> 1.0)
       rack (~> 1.0)
@@ -158,8 +159,8 @@ GEM
       actionpack (>= 3.0)
       activesupport (>= 3.0)
       sprockets (~> 2.8)
-    thor (0.18.1)
-    thread_safe (0.2.0)
+    thor (0.19.1)
+    thread_safe (0.3.1)
       atomic (>= 1.1.7, < 2)
     tilt (1.4.1)
     treetop (1.4.15)