Laravel 8 compatibility

This drops support for versions of PHP prior to 7.2

Adds new methods for getting duration in traffic.

Merge pull request #4 from MedeirosDev/feature/add-duration-in-traffi…

…c-and-modify-json-is-public

Feature/add duration in traffic and modify json is public

Small bug fix

0.3

Fixed bug with durationText()

0.2

Fix config path

0.1

I wouldn't suggest using this in production, as I am very likely to make large breaking changes soon.