bump onebox version

- FIX: show Google video preview on iOS devices
- FIX: convert relative image url to absolute url

Gemfile

@@ -34,7 +34,7 @@ gem 'redis-namespace'
 
 gem 'active_model_serializers', '~> 0.8.3'
 
-gem 'onebox', '1.8.67'
+gem 'onebox', '1.8.68'
 
 gem 'http_accept_language', '~>2.0.5', require: false
 

Gemfile.lock

@@ -258,7 +258,7 @@ GEM
     omniauth-twitter (1.4.0)
       omniauth-oauth (~> 1.1)
       rack
-    onebox (1.8.67)
+    onebox (1.8.68)
       htmlentities (~> 4.3)
       moneta (~> 1.0)
       multi_json (~> 1.11)
@@ -512,7 +512,7 @@ DEPENDENCIES
   omniauth-oauth2
   omniauth-openid
   omniauth-twitter
-  onebox (= 1.8.67)
+  onebox (= 1.8.68)
   openid-redis-store
   pg
   pry-nav