FIX: Bump onebox version to include imgur security fix

FIX: Bump onebox version to include imgur security fix

diff --git a/Gemfile b/Gemfile
index 04de71e..1bc558f 100644
--- a/Gemfile
+++ b/Gemfile
@@ -44,7 +44,7 @@ gem 'redis-namespace'
 
 gem 'active_model_serializers', '~> 0.8.3'
 
-gem 'onebox', '1.8.76'
+gem 'onebox', '1.8.77'
 
 gem 'http_accept_language', '~>2.0.5', require: false

GitHub sha: 36ff971c

beta3 coming soon?