feat: add jsnext:main

Author: vagusX

.npmignore

@@ -4,6 +4,7 @@
 node_modules/
 npm-debug.log
 
+lib/
 test/
 
 .travis.yml

package.json

@@ -2,6 +2,7 @@
   "name": "koa-proxies",
   "description": "Http Proxy Middleware for Koa@2.x/next",
   "main": "dist/koa-proxies.js",
+  "jsnext:main": "dist/koa-proxies.es2015.js",
   "scripts": {
     "build": "rimraf dist/** && NODE_ENV=production node rollup.config.js",
     "build:dev": "node rollup.config.js",

rollup.config.js

@@ -24,4 +24,11 @@ rollup.rollup({
     format: 'cjs',
     dest: pkg['main']
   })
+
+  if (process.env.NODE_ENV === 'production') {
+    bundle.write({
+      dest: pkg['jsnext:main'],
+      format: 'es'
+    })
+  }
 })