wcslib: 5.20 -> 6.2

Semi-automatic update generated by
https://github.com/ryantm/nixpkgs-update tools. This update was made
based on information from
https://repology.org/metapackage/wcslib/versions

pkgs/development/libraries/wcslib/default.nix

···
 { fetchurl,  stdenv, flex }:
 
 stdenv.mkDerivation rec {
-  version = "5.20";
+  version = "6.2";
   name = "wcslib-${version}";
 
   buildInputs = [ flex ];
 
   src = fetchurl {
     url = "ftp://ftp.atnf.csiro.au/pub/software/wcslib/${name}.tar.bz2";
-    sha256 ="1c8g9kv4dxrnawnqi4spi2p10s2xs7x75pdfxhbqxgcc97dkgh0b";
+    sha256 ="01fqckazhbfqqhyr0wd9vcks1m2afmsh83l981alxg2r54jgwkdv";
   };
 
   prePatch = ''