Start testing Laravel 7 and Travis config cleanup (#317)
Start testing Laravel 7 and Travis config cleanup (#317)

* Test on 7.4 instead of 7.4snapshot

* Test on Laravel ^6.0 instead of 6.0.*

* Add Laravel 7 test case

* Update allow_failures

* Typo

* More travis config updates

* Fix PHPUnit version for Laravel 7.x tests

getsentry/sentry-laravel,getsentry/sentry-laravel