Merge pull request #15 from oauth-xx/depfu/update/net-imap-0.5.7

🚨 [security] Update net-imap 0.5.6 → 0.5.7 (minor)

Author: pboling

Gemfile.lock

@@ -206,7 +206,7 @@ GEM
       ruby2_keywords (>= 0.0.5)
     mutex_m (0.3.0)
     mysql2 (0.5.6)
-    net-imap (0.5.6)
+    net-imap (0.5.7)
       date
       net-protocol
     net-pop (0.1.2)