fix: provide an esm build (#10)

Author: airtonix

package.json

@@ -52,7 +52,7 @@
   "types": "./dist/remark-nomnoml.d.ts",
   "exports": {
     ".": {
-      "import": "./dist/remark-nomnoml.js",
+      "import": "./dist/remark-nomnoml.mjs",
       "require": "./dist/remark-nomnoml.js",
       "types": "./dist/remark-nomnoml.d.ts"
     }

tsup.config.ts

@@ -5,6 +5,7 @@ export default defineConfig((options) => {
     name: 'remark-nomnoml',
 
     shims: true,
+    format: ['cjs', 'esm'],
 
     entry: ['src/remark-nomnoml.ts'],