Update jquery-placeholder

Gemfile

@@ -105,7 +105,7 @@ source "https://rails-assets.org" do
 
   gem "rails-assets-jeresig--jquery.hotkeys",       "0.2.0"
   gem "rails-assets-jquery-idletimer",              "1.0.1"
-  gem "rails-assets-jquery-placeholder",            "2.1.1"
+  gem "rails-assets-jquery-placeholder",            "2.1.2"
   gem "rails-assets-jquery-textchange",             "0.2.3"
   gem "rails-assets-perfect-scrollbar",             "0.6.2"
   gem "rails-assets-jakobmattsson--jquery-elastic", "1.6.11"

Gemfile.lock

@@ -534,7 +534,7 @@ GEM
       rails-assets-jquery (>= 1.3.2)
     rails-assets-jquery-fullscreen (1.1.4)
     rails-assets-jquery-idletimer (1.0.1)
-    rails-assets-jquery-placeholder (2.1.1)
+    rails-assets-jquery-placeholder (2.1.2)
       rails-assets-jquery (>= 1.6)
     rails-assets-jquery-simulate (1.0.1)
     rails-assets-jquery-simulate-ext (1.3.0)
@@ -825,7 +825,7 @@ DEPENDENCIES
   rails-assets-jeresig--jquery.hotkeys (= 0.2.0)!
   rails-assets-jquery (= 1.11.2)!
   rails-assets-jquery-idletimer (= 1.0.1)!
-  rails-assets-jquery-placeholder (= 2.1.1)!
+  rails-assets-jquery-placeholder (= 2.1.2)!
   rails-assets-jquery-simulate (= 1.0.1)!
   rails-assets-jquery-simulate-ext (= 1.3.0)!
   rails-assets-jquery-textchange (= 0.2.3)!