maintainers: add gigglesquid

maintainers/maintainer-list.nix

···
     githubId = 127353;
     name = "Geoffrey Huntley";
   };
+  gigglesquid = {
+    email = "[e-mail]";
+    github = "gigglesquid";
+    githubId = 3685154;
+    name = "Jack connors";
+  };
   gila = {
     email = "[e-mail]";
     github = "gila";