Updated nokogiri gem - CVE-2018-8048.

Gemfile.lock

@@ -149,8 +149,6 @@ GEM
     ffi-compiler (0.1.3)
       ffi (>= 1.0.0)
       rake
-    figaro (1.1.1)
-      thor (~> 0.14)
     formatador (0.2.5)
     github_changelog_generator (1.14.3)
       activesupport
@@ -243,7 +241,7 @@ GEM
     net-ldap (0.16.1)
     netrc (0.11.0)
     nio4r (2.3.0)
-    nokogiri (1.8.2)
+    nokogiri (1.8.4)
       mini_portile2 (~> 2.3.0)
     nori (2.6.0)
     notiffany (0.1.1)
@@ -511,7 +509,6 @@ DEPENDENCIES
   eventmachine
   execjs
   factory_bot_rails
-  figaro
   github_changelog_generator
   guard
   guard-livereload