Merge pull request #1063 from sul-dlss/update-dependencies

Update dependencies

Author: jcoyne

Gemfile.lock

@@ -252,7 +252,7 @@ GEM
     multi_json (1.17.0)
     mysql2 (0.5.7)
       bigdecimal
-    net-imap (0.5.10)
+    net-imap (0.5.11)
       date
       net-protocol
     net-pop (0.1.2)
@@ -356,9 +356,10 @@ GEM
       logger
       mini_portile2 (~> 2.6)
       rake (> 12)
-    rdoc (6.14.2)
+    rdoc (6.15.0)
       erb
       psych (>= 4.0.0)
+      tsort
     regexp_parser (2.11.3)
     reline (0.6.2)
       io-console (~> 0.5)