Bump slimmer to 8.1.0

Gemfile

@@ -31,7 +31,7 @@ gem 'spring',      group: :development
 if ENV['SLIMMER_DEV']
   gem 'slimmer', :path => '../slimmer'
 else
-  gem 'slimmer', '4.2.0'
+  gem 'slimmer', '8.1.0'
 end
 
 gem 'govuk_frontend_toolkit', '2.0.0'

Gemfile.lock

@@ -1,7 +1,6 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    PriorityQueue (0.1.2)
     actionmailer (4.1.4)
       actionpack (= 4.1.4)
       actionview (= 4.1.4)
@@ -42,18 +41,18 @@ GEM
       multi_json (~> 1.2)
     json (1.8.1)
     kramdown (1.5.0)
-    lrucache (0.1.4)
-      PriorityQueue (~> 0.1.2)
     mail (2.5.4)
       mime-types (~> 1.16)
       treetop (~> 1.4.8)
     mime-types (1.25.1)
+    mini_portile (0.6.2)
     minitest (5.4.0)
     multi_json (1.10.1)
     netrc (0.7.7)
-    nokogiri (1.5.11)
+    nokogiri (1.6.6.2)
+      mini_portile (~> 0.6.0)
     null_logger (0.0.1)
-    plek (1.8.1)
+    plek (1.10.0)
     polyglot (0.3.5)
     rack (1.5.2)
     rack-test (0.6.2)
@@ -88,12 +87,12 @@ GEM
     sdoc (0.4.0)
       json (~> 1.8)
       rdoc (~> 4.0, < 5.0)
-    slimmer (4.2.0)
+    slimmer (8.1.0)
+      activesupport
       json
-      lrucache (~> 0.1.3)
-      nokogiri (~> 1.5.0)
+      nokogiri (>= 1.5.0, < 1.7.0)
       null_logger
-      plek (>= 0.1.8)
+      plek (>= 1.1.0)
       rack (>= 1.3.5)
       rest-client
     spring (1.1.3)
@@ -129,6 +128,6 @@ DEPENDENCIES
   rest-client
   sass-rails (~> 4.0.3)
   sdoc (~> 0.4.0)
-  slimmer (= 4.2.0)
+  slimmer (= 8.1.0)
   spring
   uglifier (>= 1.3.0)

app/controllers/application_controller.rb

@@ -10,6 +10,6 @@ class ApplicationController < ActionController::Base
 
 private
   def set_custom_slimmer_headers
-    set_slimmer_headers(template: 'core_layout')
+    set_slimmer_headers(template: 'core_layout', report_a_problem: 'false')
   end
 end