Allow PHPUnit 6 (#6)

* Allow PHPunit 6

* Require some higher versions

* Test on SF4

* Minor

Author: Nyholm

.travis.yml

@@ -17,14 +17,16 @@ env:
   global:
     - TEST_COMMAND="composer test"
   matrix:
-    - SYMFONY_VERSION=3.2.*
+    - SYMFONY_VERSION=3.3.*
     - SYMFONY_VERSION=2.3.*
 
 matrix:
   fast_finish: true
   include:
     - php: 5.5
       env: COMPOSER_FLAGS="--prefer-stable --prefer-lowest" COVERAGE=true TEST_COMMAND="composer test-ci" SYMFONY_VERSION=2.3.*
+    - php: 7.1
+      env: SYMFONY_VERSION=4.0.*
 
 install:
     - composer require symfony/symfony:${SYMFONY_VERSION} --no-update

composer.json

@@ -13,8 +13,8 @@
         "php": "^5.5 || ^7.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^4.5 || ^5.4",
-        "symfony/symfony": "^2.3 || ^3.0"
+        "phpunit/phpunit": "^4.8.36 || ^5.5 || ^6.2",
+        "symfony/symfony": "^2.3 || ^3.0 || ^4.0"
     },
     "autoload": {
         "psr-4": { "Nyholm\\BundleTest\\": "src/" }
@@ -25,5 +25,7 @@
     "scripts": {
         "test": "vendor/bin/phpunit",
         "test-ci": "vendor/bin/phpunit --coverage-text --coverage-clover=build/coverage.xml"
-    }
+    },
+    "minimum-stability": "dev",
+    "prefer-stable": true
 }

src/BaseBundleTestCase.php

@@ -2,13 +2,14 @@
 
 namespace Nyholm\BundleTest;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\ResettableContainerInterface;
 use Symfony\Component\HttpKernel\Kernel;
 
 /**
  * @author Tobias Nyholm <[email protected]>
  */
-abstract class BaseBundleTestCase extends \PHPUnit_Framework_TestCase
+abstract class BaseBundleTestCase extends TestCase
 {
     /**
      * @var AppKernel