showCloseButton is not true by default

[stevemao]

Not sure if this is a bug or docs not updated yet. I'm using the lastest react-redux-toastr published on npm.

[diegoddox]

Because of inactivity I will close this issue but feel free to reopen in case you feel that this has to be addressed.

[stevemao]

I wasn't sure if which should be fixed: docs or code. Once you give the direction I can submit a PR.

[diegoddox]

Hi @stevemao, it will be a good help if you could update the docs.
Thanks in advance.