racket,racket-minimal: 8.6 -> 8.7

https://download.racket-lang.org/v8.7.html

pkgs/development/interpreters/racket/default.nix

···
 
 stdenv.mkDerivation rec {
   pname = "racket";
-  version = "8.6"; # always change at once with ./minimal.nix
+  version = "8.7"; # always change at once with ./minimal.nix
 
   src = (lib.makeOverridable ({ name, sha256 }:
     fetchurl {
···
     }
   )) {
     name = "${pname}-${version}";
-    sha256 = "sha256-Lv8+l7x6EM+gMg2psH8NSIZTsLW4SQMiyC84SuD6Gig=";
+    sha256 = "sha256-dqfmbUfnPrDcP8on/IGONuHUv/502iY8Xv47iAGjCgE=";
   };
 
   FONTCONFIG_FILE = fontsConf;

pkgs/development/interpreters/racket/minimal.nix

···
   version = oldAttrs.version;
   src = oldAttrs.src.override {
     name = "${pname}-${version}";
-    sha256 = "sha256-AdUJ1f/YKSD/S7Qd6EwH7MavkSKVNxatQ9hKp7OTn0g=";
+    sha256 = "sha256-Iy7ZzxfNf3Q7LM9z13XsNbWvJrJeVREprrYDi7DNwOw=";
   };
 
   meta = oldAttrs.meta // {