Laravel 5.6 updates

Travis config update

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

vendor/phar-io/version/tests/Unit/SpecificMajorAndMinorVersionConstraintTest.php

@@ -13,7 +13,7 @@ namespace PharIo\Version;
 use PHPUnit\Framework\TestCase;
 
 /**
- * @covers PharIo\Version\SpecificMajorAndMinorVersionConstraint
+ * @covers \PharIo\Version\SpecificMajorAndMinorVersionConstraint
  */
 class SpecificMajorAndMinorVersionConstraintTest extends TestCase {
     public function versionProvider() {
@@ -32,10 +32,10 @@ class SpecificMajorAndMinorVersionConstraintTest extends TestCase {
     /**
      * @dataProvider versionProvider
      *
-     * @param int     $major
-     * @param int     $minor
+     * @param int $major
+     * @param int $minor
      * @param Version $version
-     * @param bool    $expectedResult
+     * @param bool $expectedResult
      */
     public function testReturnsTrueForCompliantVersions($major, $minor, Version $version, $expectedResult) {
         $constraint = new SpecificMajorAndMinorVersionConstraint('foo', $major, $minor);