nodejs-15_x: init at 15.0.0

Changelog: https://github.com/nodejs/node/releases/tag/v15.0.0

pkgs/development/web/nodejs/v15.nix

@@ -0,0 +1,13 @@
+{ callPackage, openssl, python3, enableNpm ? true }:
+
+let
+  buildNodejs = callPackage ./nodejs.nix {
+    inherit openssl;
+    python = python3;
+  };
+in
+  buildNodejs {
+    inherit enableNpm;
+    version = "15.0.0";
+    sha256 = "0yrlzxrqb5j0qyj4qgzfxyvvd7c76hpslkiswj3cjcq70qbql4zn";
+  }

pkgs/top-level/all-packages.nix

@@ -5104,10 +5104,13 @@ in
   nodejs-slim-14_x = callPackage ../development/web/nodejs/v14.nix {
     enableNpm = false;
   };
-
+  nodejs-15_x = callPackage ../development/web/nodejs/v15.nix { };
+  nodejs-slim-15_x = callPackage ../development/web/nodejs/v15.nix {
+    enableNpm = false;
+  };
   # Update this when adding the newest nodejs major version!
-  nodejs_latest = nodejs-14_x;
-  nodejs-slim_latest = nodejs-slim-14_x;
+  nodejs_latest = nodejs-15_x;
+  nodejs-slim_latest = nodejs-slim-15_x;
 
   nodePackages_latest = dontRecurseIntoAttrs (callPackage ../development/node-packages/default.nix {
     nodejs = pkgs.nodejs_latest;