Complete refactor of Gemfile and upgraded gems (#2553)

app/controllers/concerns/authenticator.rb

@@ -113,7 +113,7 @@ module Authenticator
       old_user.rooms.each do |room|
         room.owner = user
 
-        room.name = "Old " + room.name if room.id == old_user.main_room.id
+        room.name = "Old #{room.name}" if room.id == old_user.main_room.id
 
         room.save!
       end

app/controllers/concerns/rolify.rb

@@ -123,9 +123,10 @@ module Rolify
       :can_manage_rooms_recordings, :can_appear_in_share_list, :colour)
 
     permission_params.transform_values! do |v|
-      if v == "0"
+      case v
+      when "0"
         "false"
-      elsif v == "1"
+      when "1"
         "true"
       else
         v