Added cmcdragonkai to the list of maintainers

lib/maintainers.nix

···
   choochootrain = "Hurshal Patel <[e-mail]>";
   christopherpoole = "Christopher Mark Poole <[e-mail]>";
   cleverca22 = "Michael Bishop <[e-mail]>";
+  cmcdragonkai = "Roger Qiu <[e-mail]>";
   coconnor = "Corey O'Connor <[e-mail]>";
   codsl = "codsl <[e-mail]>";
   codyopel = "Cody Opel <[e-mail]>";