plover.dev: add missing setuptools dependency

Without this, it crashes instantly at startup looking for
pkg_resources.

pkgs/applications/misc/plover/default.nix

@@ -43,6 +43,6 @@
     postPatch = "sed -i /PyQt5/d setup.cfg";
 
     checkInputs           = [ pytest mock ];
-    propagatedBuildInputs = [ Babel pyqt5 xlib pyserial appdirs wcwidth ];
+    propagatedBuildInputs = [ Babel pyqt5 xlib pyserial appdirs wcwidth setuptools ];
   };
 }