elvish: 0.5 -> 0.9

pkgs/shells/elvish/default.nix

···
 
 buildGoPackage rec {
   name = "elvish-${version}";
-  version = "0.5";
+  version = "0.9";
 
   goPackagePath = "github.com/elves/elvish";
 
···
     repo = "elvish";
     owner = "elves";
     rev = version;
-    sha256 = "1dk5f8a2wpgd5cw45ippvx46fxk0yap64skfpzpiqz8bkbnrwbz6";
+    sha256 = "0alsv04iihrk1nffp6fmyzxid26dqhg1k45957c2ymyzyq9cglxj";
   };
 
   goDeps = ./deps.nix;
 
   meta = with stdenv.lib; {
-    description = "A Novel unix shell in go language";
+    description = "A friendly and expressive Unix shell";
     homepage = https://github.com/elves/elvish;
     license = licenses.bsd2;
     maintainers = with maintainers; [ vrthra ];