update html-pipeline 2.7.1 -> 2.8

Gemfile

@@ -132,7 +132,7 @@ gem 'unf', '~> 0.1.4'
 gem 'seed-fu', '~> 2.3.7'
 
 # Markdown and HTML processing
-gem 'html-pipeline', '~> 2.7.1'
+gem 'html-pipeline', '~> 2.8'
 gem 'deckar01-task_list', '2.0.0'
 gem 'gitlab-markup', '~> 1.6.4'
 gem 'redcarpet', '~> 3.4'

Gemfile.lock

@@ -394,7 +394,7 @@ GEM
     hipchat (1.5.2)
       httparty
       mimemagic
-    html-pipeline (2.7.1)
+    html-pipeline (2.8.3)
       activesupport (>= 2)
       nokogiri (>= 1.4)
     html2text (0.2.0)
@@ -1061,7 +1061,7 @@ DEPENDENCIES
   hashie-forbidden_attributes
   health_check (~> 2.6.0)
   hipchat (~> 1.5.0)
-  html-pipeline (~> 2.7.1)
+  html-pipeline (~> 2.8)
   html2text
   httparty (~> 0.13.3)
   icalendar

Gemfile.rails5.lock

@@ -397,7 +397,7 @@ GEM
     hipchat (1.5.2)
       httparty
       mimemagic
-    html-pipeline (2.7.1)
+    html-pipeline (2.8.3)
       activesupport (>= 2)
       nokogiri (>= 1.4)
     html2text (0.2.0)
@@ -1071,7 +1071,7 @@ DEPENDENCIES
   hashie-forbidden_attributes
   health_check (~> 2.6.0)
   hipchat (~> 1.5.0)
-  html-pipeline (~> 2.7.1)
+  html-pipeline (~> 2.8)
   html2text
   httparty (~> 0.13.3)
   icalendar