Laravel 5.6 updates

Travis config update

Removed HHVM script as Laravel no longer support HHVM after releasing 5.3

vendor/symfony/console/Tests/Input/InputOptionTest.php

@@ -74,26 +74,12 @@ class InputOptionTest extends TestCase
     }
 
     /**
-     * @dataProvider provideInvalidModes
+     * @expectedException \InvalidArgumentException
+     * @expectedExceptionMessage Option mode "-1" is not valid.
      */
-    public function testInvalidModes($mode)
+    public function testInvalidModes()
     {
-        if (method_exists($this, 'expectException')) {
-            $this->expectException('InvalidArgumentException');
-            $this->expectExceptionMessage(sprintf('Option mode "%s" is not valid.', $mode));
-        } else {
-            $this->setExpectedException('InvalidArgumentException', sprintf('Option mode "%s" is not valid.', $mode));
-        }
-
-        new InputOption('foo', 'f', $mode);
-    }
-
-    public function provideInvalidModes()
-    {
-        return array(
-            array('ANOTHER_ONE'),
-            array(-1),
-        );
+        new InputOption('foo', 'f', '-1');
     }
 
     /**