Upgrade dagger

Change-Id: Icf9bfc6bc40b66135d161a5047d01d46b217b328
Depends-On:  Icf9bfc6bc40b66135d161a5047d01d46b217b328
Reviewed-on: http://gerrit.dmdirc.com/3007
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Chris Smith <chris@dmdirc.com>