Bumped Symfony version

.travis.yml

@@ -12,14 +12,12 @@ env:
         - SYMFONY_PHPUNIT_DIR=$HOME/.phpunit-bridge
         - SYMFONY_PHPUNIT_REMOVE='' # don't remove prophecy
 
-php: [7.2, 7.1, 7.0, 5.6, 5.5, 5.4]
+php: [7.2, 7.1]
 
 matrix:
     include:
         - php: 7.2
           env: COMPOSER_FLAGS='--prefer-lowest --prefer-stable'
-        - php: 5.3
-          dist: precise
         - php: 7.2
           env: STABILITY=dev
 

Tests/ProcessorTest.php

@@ -17,15 +17,15 @@ class ProcessorTest extends TestCase
      */
     private $processor;
 
-    protected function setUp()
+    protected function setUp(): void
     {
         parent::setUp();
 
         $this->io = $this->prophesize('Composer\IO\IOInterface');
         $this->processor = new Processor($this->io->reveal());
     }
 
-    protected function tearDown()
+    protected function tearDown(): void
     {
         parent::tearDown();
 

Tests/ScriptHandlerTest.php

@@ -11,7 +11,7 @@ class ScriptHandlerTest extends TestCase
     private $io;
     private $package;
 
-    protected function setUp()
+    protected function setUp(): void
     {
         parent::setUp();
 

composer.json

@@ -11,13 +11,13 @@
         }
     ],
     "require": {
-        "php": ">=5.3.3",
-        "symfony/yaml": "^2.3 || ^3.0 || ^4.0"
+        "php": ">=7.1",
+        "symfony/yaml": "^3.4 || ^4.2"
     },
     "require-dev": {
         "composer/composer": "^1.0@dev",
-        "symfony/filesystem": "^2.3 || ^3 || ^4",
-        "symfony/phpunit-bridge": "^4.0"
+        "symfony/filesystem": "^3.4 || ^4.2",
+        "symfony/phpunit-bridge": "^4.2"
     },
     "autoload": {
         "psr-4": { "Incenteev\\ParameterHandler\\": "" }