Write lint to check for dashmaps entries being held

Signed-off-by: Marcel Müller <neikos@neikos.email>

flake.nix

@@ -109,6 +109,9 @@
             pkgs.openssl
             pkgs.pkg-config
           ];
+
+          DYLINT_DRIVER_PATH = dylint.passthru.DYLINT_DRIVER_PATH;
+          RUSTUP_TOOLCHAIN = toolchain;
         };
       }
     );