Remove travis file and fix NULL error in sqlite.

.travis.yml

@@ -1,22 +0,0 @@
-language: php
-sudo: false
-php:
-  - 7
-
-install:
-  - phpenv config-rm xdebug.ini
-  - composer selfupdate
-  - rm composer.lock
-  - composer update --no-scripts
-  - php artisan clear-compiled
-  - php artisan optimize
-  - php artisan env
-  - mv -v .env.testing .env
-  - php artisan env
-  - touch storage/upload/at-1.data
-  - touch storage/upload/at-2.data
-  - touch storage/database/testing.db
-  - php artisan migrate --seed
-
-script:
-  - phpunit

app/Support/Migration/TestData.php

@@ -813,6 +813,7 @@ class TestData
                 'created_at'     => $this->time,
                 'updated_at'     => $this->time,
                 'email'          => $user['email'],
+                'remember_token' => '',
                 'password'       => bcrypt($user['password']),
             ];