Update sourcemap setting in rollup

Author: michalsnik

rollup.config.js

@@ -20,9 +20,9 @@ export default [
  output: {
  file: pkg.browser,
  name: 'AOS',
- format: 'umd'
+ format: 'umd',
+ sourcemap: process.env.NODE_ENV === 'dev'
  },
- sourceMap: process.env.NODE_ENV === 'dev',
  plugins: [
  transformStyles,
  resolve(),