pylance: init at 2020.11.2 (#105601)

pkgs/misc/vscode-extensions/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, config, lib, callPackage, vscode-utils, llvmPackages_8, llvmPackages_latest }:
+{ stdenv, config, lib, callPackage, vscode-utils, nodePackages,llvmPackages_8, llvmPackages_latest }:
 
 let
   inherit (vscode-utils) buildVscodeMarketplaceExtension;
@@ -25,6 +25,21 @@ let
         };
       };
 
+      ms-python.vscode-pylance = buildVscodeMarketplaceExtension {
+        mktplcRef = {
+          name = "vscode-pylance";
+          publisher = "MS-python";
+          version = "2020.11.2";
+          sha256 = "0n2dm21vgzir3hx1m3pmx7jq4zy3hdxfsandd2wv5da4fs9b5g50";
+        };
+
+        buildInputs = [ nodePackages.pyright ];
+
+        meta = {
+          license = stdenv.lib.licenses.unfree;
+        };
+      };
+
       bbenoist.Nix = buildVscodeMarketplaceExtension {
         mktplcRef = {
           name = "Nix";