Merge pull request #20975 from holidaycheck/node-7.2.1

nodejs: 7.1.0 -> 7.2.1

pkgs/development/web/nodejs/v7.nix

···
   baseName = if enableNpm then "nodejs" else "nodejs-slim";
 in
   stdenv.mkDerivation (nodejs // rec {
-    version = "7.1.0";
+    version = "7.2.1";
     name = "${baseName}-${version}";
     src = fetchurl {
       url = "https://nodejs.org/download/release/v${version}/node-v${version}.tar.xz";
-      sha256 = "10a9rwi9v8ylpxydfh1f59smqbljk5axqwghp1qszqwh40d87bjm";
+      sha256 = "03fqv6k8y42ldnrz4iirhwg6wdyw8z95h9h40igiriicbnm072y0";
     };
 
   })