fix: revert index extension to .mjs for esm

Author: Danny Yoo

package.json

@@ -6,10 +6,10 @@
   "license": "MIT",
   "repository": "techniq/odata-query",
   "main": "./dist/index.cjs.js",
-  "module": "./dist/index.es.js",
+  "module": "./dist/index.js.mjs",
   "exports": {
     "types": "./dist/index.d.ts",
-    "import": "./dist/index.es.js",
+    "import": "./dist/index.js.mjs",
     "require": "./dist/index.cjs.js"
   },
   "types": "./dist/index.d.ts",

vite.config.ts

@@ -5,9 +5,14 @@ export default defineConfig({
     lib: {
       entry: 'src/index.ts',
       name: 'odata-query',
-      fileName: (format) => `index.${format}.js`,
       formats: ['es', 'cjs'],
     },
     outDir: 'dist',
+    rollupOptions: {
+      output: [
+        {format: 'es', entryFileNames: 'index.js.mjs'},
+        {format: 'cjs', entryFileNames: 'index.cjs.js'}
+	  ]
+	}
   }
 });