chore: fix build

Author: gregberge

rollup.config.js

@@ -3,7 +3,7 @@ import resolve from 'rollup-plugin-node-resolve'
 import babel from 'rollup-plugin-babel'
 import replace from 'rollup-plugin-replace'
 import commonjs from 'rollup-plugin-commonjs'
-import uglify from 'rollup-plugin-uglify'
+import { uglify } from 'rollup-plugin-uglify'
 import pkg from './package.json'
 
 const SOURCE_DIR = path.resolve(__dirname, 'src')