bump handlebars_assets

Gemfile

@@ -77,7 +77,7 @@ gem 'entypo-rails', '2.2.2'
 # JavaScript
 
 gem 'backbone-on-rails',   '1.1.1'
-gem 'handlebars_assets',   '0.17.1'
+gem 'handlebars_assets',   '0.18.0'
 gem 'jquery-rails',        '3.1.2'
 gem 'rails-assets-jquery', '1.11.1' # Should be kept in sync with jquery-rails
 gem 'js_image_paths',      '0.0.1'

Gemfile.lock

@@ -209,7 +209,7 @@ GEM
       spork (>= 0.8.4)
     haml (4.0.5)
       tilt
-    handlebars_assets (0.17.1)
+    handlebars_assets (0.18)
       execjs (>= 1.2.9)
       multi_json
       sprockets (>= 2.0.3)
@@ -529,7 +529,7 @@ DEPENDENCIES
   guard-rspec (= 4.3.1)
   guard-spork (= 1.5.1)
   haml (= 4.0.5)
-  handlebars_assets (= 0.17.1)
+  handlebars_assets (= 0.18.0)
   http_accept_language (= 2.0.2)
   i18n-inflector-rails (= 1.0.7)
   jasmine (= 2.0.2)