nodejs: use icu63 for nodejs12

pkgs/development/web/nodejs/v12.nix

@@ -1,7 +1,7 @@
-{ stdenv, callPackage, lib, openssl, enableNpm ? true }:
+{ stdenv, callPackage, lib, openssl, icu, enableNpm ? true }:
 
 let
-  buildNodejs = callPackage ./nodejs.nix { inherit openssl; };
+  buildNodejs = callPackage ./nodejs.nix { inherit openssl icu; };
 in
   buildNodejs {
     inherit enableNpm;

pkgs/top-level/all-packages.nix

@@ -4201,10 +4201,12 @@ in
   };
   nodejs-12_x = callPackage ../development/web/nodejs/v12.nix {
     openssl = openssl_1_1;
+    icu = icu63;
   };
   nodejs-slim-12_x = callPackage ../development/web/nodejs/v12.nix {
     enableNpm = false;
     openssl = openssl_1_1;
+    icu = icu63;
   };
 
   # Update this when adding the newest nodejs major version!