Breaks tests with the default CRA setup

Hi, The package which is published to npm is using import syntax and it breaks tests when your are using default setup created by create-react-app. I get this error when running tests which use react-bootstrap-sweetalert:

({"Object.<anonymous>":function(module,exports,require,__dirname,__filename,global,jest){import SweetAlert from "./components/SweetAlert";
                                                                                             ^^^^^^

    SyntaxError: Cannot use import statement outside a module

I've created this simple example where you can see the issue https://github.com/mjetek/test-react-bootstrap-sweetalert

djorg83 / react-bootstrap-sweetalert

Breaks tests with the default CRA setup #59