bumb phpunit version

.travis.yml

@@ -2,11 +2,10 @@ dist: trusty
 sudo: required
 language: php
 php:
-  - 5.6
-  - 7.0
   - 7.1
   - 7.2
   - 7.3
+  - 7.4
 
 addons:
   apt:

composer.json

@@ -13,7 +13,7 @@
 		"icewind/streams": ">=0.2.0"
 	},
 	"require-dev": {
-		"phpunit/phpunit": "^5.7",
+		"phpunit/phpunit": "^7.0",
 		"friendsofphp/php-cs-fixer": "^2.13"
 	},
 	"autoload"         : {

tests/ParserTest.php

@@ -10,7 +10,7 @@ namespace Icewind\SMB\Test;
 use Icewind\SMB\IFileInfo;
 use Icewind\SMB\Wrapped\FileInfo;
 
-class ParserTest extends \PHPUnit_Framework_TestCase {
+class ParserTest extends \PHPUnit\Framework\TestCase {
 	public function modeProvider() {
 		return [
 			['D', IFileInfo::MODE_DIRECTORY],

tests/TestCase.php

@@ -7,7 +7,7 @@
 
 namespace Icewind\SMB\Test;
 
-abstract class TestCase extends \PHPUnit_Framework_TestCase {
+abstract class TestCase extends \PHPUnit\Framework\TestCase {
 	protected function requireBackendEnv($backend) {
 		if (getenv('BACKEND') and getenv('BACKEND') !== $backend) {
 			$this->markTestSkipped('Skipping tests for ' . $backend . ' backend');