Spanish support

[checor]

Hello!

Your library is cool, and I'm intending to implement it in one of my projects 👍

I can provide you a spanish translation, are you interested in adding it to your repo? I can send a pull request.

Cheers!

[Skycoder42]

Of course, feel free to do so! This way it will also become available to anyone using the online repository with the next version. 👍

[Skycoder42]

The translations have been updated on the major branch. It was auto-translated using https://www.matecat.com/. It would be awesome if you could verify the correctness of the generated translations. Thanks.

[checor]

Of course, seems that some messages needs grammar corrections. I will check it out in the week.