Remove final keyword and Implementat SelectorInterface

Author: m3m0r7

src/Driver/Selector.php

@@ -14,7 +14,7 @@
 use SebastianBergmann\CodeCoverage\NoCodeCoverageDriverWithPathCoverageSupportAvailableException;
 use SebastianBergmann\Environment\Runtime;
 
-final class Selector
+class Selector implements SelectorInterface
 {
     /**
      * @throws NoCodeCoverageDriverAvailableException

src/Driver/SelectorInterface.php

@@ -0,0 +1,18 @@
+<?php declare(strict_types=1);
+/*
+ * This file is part of phpunit/php-code-coverage.
+ *
+ * (c) Sebastian Bergmann <sebastian@phpunit.de>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace SebastianBergmann\CodeCoverage\Driver;
+
+use SebastianBergmann\CodeCoverage\Filter;
+
+interface SelectorInterface
+{
+    public function forLineCoverage(Filter $filter): Driver;
+    public function forLineAndPathCoverage(Filter $filter): Driver;
+}