rollup.config.js in opal-js_wrap-three-0.1.0 vs rollup.config.js in opal-js_wrap-three-0.1.1

@@ -13,9 +13,10 @@
     commonjs(),
     babel({
       "babelHelpers": "runtime",
       "presets": ["@babel/preset-env"],
       "compact" : false,
+      "targets": { "chrome": 38 },
       "plugins": [
         "@babel/plugin-transform-runtime"
       ]
     })
   ]