rPackages.rsamplr: add cargo and rust

pkgs/development/r-modules/default.nix

@@ -789,6 +789,10 @@ let
     Rpoppler = [ pkgs.poppler ];
     RPostgreSQL = with pkgs; [ libpq.pg_config ];
     RProtoBuf = [ pkgs.protobuf ];
+    rsamplr = with pkgs; [
+      cargo
+      rustc
+    ];
     RSclient = [ pkgs.openssl.dev ];
     Rserve = [ pkgs.openssl ];
     Rssa = [ pkgs.fftw.dev ];