Add hasIndex and dropIndexIfExists methods

fix filtering with operator not like issue

EmbedsMany respect primaryKey on association

Co-Authored-By: Jens Segers <segers.jens@gmail.com>

# Conflicts:
#	tests/SchemaTest.php

Code cleanup

fix for non string id

Change operator (-> to ::)

* use env values from phpunit.xml, update database.php and queue.php

* Add .editorconfig

* Update QueueTest.php

* Update phpunit.xml.dist

* Use in casting instead intval

Fixes #1741

Fixes #1798

* Revert changes in Builder and Model for id keys, fix test for Queue

* Fix format in Model

*   Update Dockerfile, add for methods setUp and tearDown return type hint in all tests, replace fire on dispatch

* Resolve error test with touch

* Use COMPOSER_VERSION in Dockerfile

* Add alias for composer

* Change parent method's names
Broken commit in laravel: https://github.com/laravel/framework/commit/2ee18923eaff142a89439f0adf0d3f15c30db85b

* Remove changes in .travis.yml

* Remove changes from Dockerfile

* Revert changes in docker-compose.yml

* Update image with mysql

Update originalIsEquivalent to work with Laravel 5.8