[Vuejs]-Does vue-cli transpile/polyfill/shim async/await for IE11?

You should check it on your own, because i don’t know what template of vue-cli you use.

You need to check if Babel is connected to your webpack config. Read this doc to learn more about it.

Then check the .babelrc file in your project directory. Check the targets property in this file. Editting this property you can set up browsers that should be compatible with your code.

More info about this