txr: 301 -> 302 (#426917)

pkgs/by-name/tx/txr/package.nix

···
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "txr";
-  version = "301";
+  version = "302";
 
   src = fetchurl {
     url = "https://www.kylheku.com/cgit/txr/snapshot/txr-${finalAttrs.version}.tar.bz2";
-    hash = "sha256-n0irroNVb5UICjspaASO6IGs+zfiD3gK6LyLA+Bppiw=";
+    hash = "sha256-8N4BLtYiGOBJ0Jo5rmqTh1mNjqwSp8LX2dkGwnw271Q=";
   };
 
   buildInputs = [ libffi ];