build(rollup.config.js): use rollup for browser builds

Author: michael-ciniawsky

rollup.config.js

@@ -0,0 +1,19 @@
+import { minify } from 'uglify-es'
+import cjs from 'rollup-plugin-commonjs'
+import uglify from 'rollup-plugin-uglify'
+
+const env = !process.env.ROLLUP_WATCH
+
+export default {
+  name: 'render',
+  input: 'lib/index.js',
+  output: {
+    file: 'lib/browser.min.js',
+    format: 'iife',
+    sourcemap: true
+  },
+  plugins: [
+    cjs(),
+    env && uglify({}, minify)
+  ]
+}