Make tests for MongoDB with Travis CI thru Ava Testing

[invisicat]

as title says.
heres some resources to help out

https://coderwall.com/p/ayb_la/travis-ci-and-mongodb

https://github.com/avajs/ava/blob/master/docs/recipes/isolated-mongodb-integration-tests.md

[invisicat]

https://www.twilio.com/blog/abstract-syntax-trees another useful resource