update rails-timeago to 2.18.0

Gemfile

@@ -192,7 +192,7 @@ gem "typhoeus",           "1.3.1"
 gem "gon",                     "6.3.2"
 gem "hamlit",                  "2.11.0"
 gem "mobile-fu",               "1.4.0"
-gem "rails-timeago",           "2.17.1"
+gem "rails-timeago",           "2.18.0"
 gem "will_paginate",           "3.3.0"
 
 # Logging

Gemfile.lock

@@ -595,7 +595,7 @@ GEM
     rails-i18n (5.1.3)
       i18n (>= 0.7, < 2)
       railties (>= 5.0, < 6)
-    rails-timeago (2.17.1)
+    rails-timeago (2.18.0)
       actionpack (>= 3.1)
       activesupport (>= 3.1)
     railties (5.2.4.2)
@@ -901,7 +901,7 @@ DEPENDENCIES
   rails-assets-utatti-perfect-scrollbar (= 1.4.0)!
   rails-controller-testing (= 1.0.4)
   rails-i18n (= 5.1.3)
-  rails-timeago (= 2.17.1)
+  rails-timeago (= 2.18.0)
   rb-fsevent (= 0.10.3)
   rb-inotify (= 0.10.1)
   redcarpet (= 3.5.0)