Change rollup config to ES Module

Author: Maks1mS

rollup.config.js

@@ -0,0 +1,34 @@
+import typescript from "@rollup/plugin-typescript";
+import nodeResolve from "@rollup/plugin-node-resolve";
+import commonjs from "@rollup/plugin-commonjs";
+import json from "@rollup/plugin-json";
+import terser from "@rollup/plugin-terser";
+import externals from "rollup-plugin-node-externals";
+
+
+const productionMode = process.env.NODE_ENV === "production";
+
+const sourceMapEnabled = !productionMode;
+
+export default {
+  input: "src/extension.ts",
+  output: {
+    dir: "out",
+    format: "cjs",
+    sourcemap: sourceMapEnabled,
+  },
+  external: ["vscode"],
+  plugins: [
+    commonjs(),
+    json(),
+    typescript({
+      compilerOptions: { 
+        module: "esnext",
+        sourceMap: sourceMapEnabled,
+      },
+    }),
+    !productionMode && externals(),
+    productionMode && nodeResolve(),
+    productionMode && terser(),
+  ],
+}