Maintenance: Update dependency net-http to v0.6.0

Gemfile.lock

@@ -371,7 +371,7 @@ GEM
     net-ftp (0.3.8)
       net-protocol
       time
-    net-http (0.5.0)
+    net-http (0.6.0)
       uri
     net-imap (0.5.1)
       date