fix(ci): try upgrading from travisci to circleci

[seanforyou23]

Hello! I noticed the CI job was busted and wanted to try and help. TravisCI seems to be losing traction in the community and with the current configuration not working, I thought it may be a good time to upgrade to something else. I've removed the config for travis and added one for circleci which can be easily extended to do other types of checks if you need. I'm using the badge for my personal circleci account, if you guys can set up an account I'd be happy to update it to point to the badge under the org, until then it would just read "no builds". You can check it with this link.

Anyway, this should close #9 and take the build from failing

to passing

Here's a couple more screengrabs of what the new dashboard would look like.

I hope it helps, please let me know if you have any questions!

[VladaPetrovic]

This is a great job @seanforyou23 🚀
Thank you for your contribution. I'll check with the team about switching to the CircleCI and get back to you.