Update nokogiri to 1.8.2
diff --git a/site/Gemfile.lock b/site/Gemfile.lock
index 3578a36..aa559ce 100644
--- a/site/Gemfile.lock
+++ b/site/Gemfile.lock
@@ -95,11 +95,11 @@
       middleman-core (~> 3.2)
       rouge (~> 1.0)
     mime-types (2.6.2)
-    mini_portile (0.6.2)
+    mini_portile2 (2.3.0)
     minitest (5.8.1)
     multi_json (1.11.2)
-    nokogiri (1.6.6.2)
-      mini_portile (~> 0.6.0)
+    nokogiri (1.8.2)
+      mini_portile2 (~> 2.3.0)
     padrino-helpers (0.12.5)
       i18n (~> 0.6, >= 0.6.7)
       padrino-support (= 0.12.5)