chore(enhanced): fix esm exports (#2408)

Co-authored-by: ScriptedAlchemy <[email protected]>

Author: ScriptedAlchemy

.changeset/strange-points-play.md

@@ -0,0 +1,5 @@
+---
+'@module-federation/enhanced': patch
+---
+
+fix esm export formats and make webpack optional peer

packages/enhanced/package.json

@@ -14,6 +14,11 @@
   "peerDependencies": {
     "webpack": "^5.0.0"
   },
+  "peerDependenciesMeta": {
+    "webpack": {
+      "optional": true
+    }
+  },
   "exports": {
     ".": {
       "types": "./dist/src/index.d.ts",

packages/enhanced/src/webpack.ts

@@ -1 +1,2 @@
-export { default as ModuleFederationPlugin } from './wrapper/ModuleFederationPlugin';
+import { default as ModuleFederationPlugin } from './wrapper/ModuleFederationPlugin';
+export { ModuleFederationPlugin };