Update compromised gems (loofah & nokogiri)

Author: jurre

Gemfile.lock

@@ -711,7 +711,7 @@ GEM
       addressable (~> 2.3)
     letter_opener (1.2.0)
       launchy (~> 2.2)
-    loofah (2.1.1)
+    loofah (2.2.1)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     mail (2.7.0)
@@ -732,7 +732,7 @@ GEM
       bourbon (>= 3.1)
       sass (~> 3.2.19)
     newrelic_rpm (3.9.0.229)
-    nokogiri (1.8.1)
+    nokogiri (1.8.2)
       mini_portile2 (~> 2.3.0)
     normalize-rails (3.0.1)
     orm_adapter (0.5.0)