Update gemset

Author: rossabaker

gemset.nix

@@ -725,10 +725,10 @@
     platforms = [];
     source = {
       remotes = ["http://rubygems.org"];
-      sha256 = "1g43ii497cwdqhfnaxfl500bq5yfc5hfv5df1lvf6wcjnd708ihd";
+      sha256 = "11w59ga9324yx6339dgsflz3dsqq2mky1qqdwcg6wi5s1bf2yldi";
       type = "gem";
     };
-    version = "1.13.4";
+    version = "1.13.6";
   };
   octokit = {
     dependencies = ["faraday" "sawyer"];