python.pkgs.uproot: update checkInputs

(cherry picked from commit 1435d45b4e0ab1ce19cfc97dbfb23b599e31f235)

pkgs/development/python-modules/uproot/default.nix

···
 , pytest
 , pkgconfig
 , lz4
+, mock
+, requests
 , backports_lzma
 }:
 
···
     sha256 = "1fafe476c26252e4dbd399456323778e76d23dc2f43cf6581a707d1647978610";
   };
 
-  buildInputs = [ pytestrunner ];
-  checkInputs = [ pytest pkgconfig lz4 ]
+  nativeBuildInputs = [ pytestrunner ];
+  checkInputs = [ pytest pkgconfig lz4 mock requests ]
     ++ lib.optionals (pythonOlder "3.3") [ backports_lzma ];
   propagatedBuildInputs = [ numpy cachetools uproot-methods awkward ];