[#79] Update nikic/php-parser from ~1.3 to ~2.0 to support PHP 7

Author: tomzx

composer.json

@@ -24,7 +24,7 @@
 
 		"hassankhan/config": "~0.9",
 		"herrera-io/phar-update": "~2.0",
-		"nikic/php-parser": "~1.3",
+		"nikic/php-parser": "~2.0",
 		"symfony/console": "~2.7|~3.0",
 		"symfony/yaml": "~2.7|~3.0",
 		"tomzx/finder": "~0.1"

src/PHPSemVerChecker/Scanner/Scanner.php

@@ -3,18 +3,18 @@
 namespace PHPSemVerChecker\Scanner;
 
 use PhpParser\Error;
-use PhpParser\Lexer\Emulative;
 use PhpParser\NodeTraverser;
 use PhpParser\NodeVisitor\NameResolver;
-use PhpParser\Parser;
+use PhpParser\ParserFactory;
 use PHPSemVerChecker\Registry\Registry;
 use PHPSemVerChecker\Visitor\ClassVisitor;
 use PHPSemVerChecker\Visitor\FunctionVisitor;
 use PHPSemVerChecker\Visitor\InterfaceVisitor;
 use PHPSemVerChecker\Visitor\TraitVisitor;
 use RuntimeException;
 
-class Scanner {
+class Scanner
+{
 	/**
 	 * @var \PHPSemVerChecker\Registry\Registry
 	 */
@@ -31,7 +31,7 @@ class Scanner {
 	public function __construct()
 	{
 		$this->registry = new Registry();
-		$this->parser = new Parser(new Emulative());
+		$this->parser = (new ParserFactory())->create(ParserFactory::PREFER_PHP7);
 		$this->traverser = new NodeTraverser();
 
 		$visitors = [