message: Fix node 6 rollup build
diff: @@ -48,20 +48,18 @@ const baseConfig = {
  };
  export default [
  - {
  - ...baseConfig,
  + Object.assign({}, baseConfig, {
  plugins: makePlugins(false),
  output: [
  { file: 'bundles/urql.es.js', format: 'es' },
  { file: 'bundles/urql.cjs.js', format: 'cjs' },
  ],
  - },
  - {
  - ...baseConfig,
  + }),
  + Object.assign({}, baseConfig, {
  plugins: makePlugins(true),
  output: [
  { file: 'bundles/urql.es.min.js', format: 'es' },
  { file: 'bundles/urql.cjs.min.js', format: 'cjs' },
  ],
  - },
  + }),
  ];
  