Security update for compromised gems.

Name: nokogiri
Version: 1.8.2
Advisory: CVE-2018-14404
Criticality: Unknown
URL: sparklemotion/nokogiri#1785
Title: Nokogiri gem, via libxml2, is affected by multiple vulnerabilities

Name: nokogiri
Version: 1.8.2
Advisory: CVE-2018-8048
Criticality: Unknown
URL: sparklemotion/nokogiri#1746
Title: Revert libxml2 behavior in Nokogiri gem that could cause XSS

Name: sprockets
Version: 2.12.4
Advisory: CVE-2018-3760
Criticality: Unknown
URL: https://groups.google.com/forum/#!topic/ruby-security-ann/2S9Pwz2i16k
Title: Path Traversal in Sprockets

Gemfile.lock

@@ -155,7 +155,7 @@ GEM
     multi_xml (0.5.5)
     mustermann19 (0.4.3)
       enumerable-lazy
-    nokogiri (1.8.2)
+    nokogiri (1.8.5)
       mini_portile2 (~> 2.3.0)
     open4 (1.3.4)
     orm_adapter (0.5.0)
@@ -231,7 +231,7 @@ GEM
       json (~> 1.8)
       simplecov-html (~> 0.10.0)
     simplecov-html (0.10.0)
-    sprockets (2.12.4)
+    sprockets (2.12.5)
       hike (~> 1.2)
       multi_json (~> 1.0)
       rack (~> 1.0)