bump rails-assets-jquery-placeholder

Gemfile

@@ -105,7 +105,7 @@ source "https://rails-assets.org" do
   # jQuery plugins
 
   gem "rails-assets-jeresig--jquery.hotkeys",       "0.2.0"
-  gem "rails-assets-jquery-placeholder",            "2.1.2"
+  gem "rails-assets-jquery-placeholder",            "2.1.3"
   gem "rails-assets-jquery-textchange",             "0.2.3"
   gem "rails-assets-perfect-scrollbar",             "0.6.7"
   gem "rails-assets-jakobmattsson--jquery-elastic", "1.6.11"

Gemfile.lock

@@ -547,7 +547,7 @@ GEM
       rails-assets-jquery (>= 1.4.2)
     rails-assets-jquery (1.11.2)
     rails-assets-jquery-fullscreen-plugin (0.5.0)
-    rails-assets-jquery-placeholder (2.1.2)
+    rails-assets-jquery-placeholder (2.1.3)
       rails-assets-jquery (>= 1.6)
     rails-assets-jquery-textchange (0.2.3)
       rails-assets-jquery
@@ -835,7 +835,7 @@ DEPENDENCIES
   rails-assets-jasmine-ajax (= 3.2.0)!
   rails-assets-jeresig--jquery.hotkeys (= 0.2.0)!
   rails-assets-jquery (= 1.11.2)!
-  rails-assets-jquery-placeholder (= 2.1.2)!
+  rails-assets-jquery-placeholder (= 2.1.3)!
   rails-assets-jquery-textchange (= 0.2.3)!
   rails-assets-markdown-it (= 5.0.0)!
   rails-assets-markdown-it--markdown-it-for-inline (= 0.1.1)!