Update assertion method to check for same values

Co-authored-by: Pascal Birchler <[email protected]>

Author: thelovekesh

tests/test-wp-version-resolver.php

@@ -75,7 +75,7 @@ public function test_wp_version_resolver( $env, $expected ) {
 
 		$output = exec( 'php ' . dirname( __DIR__ ) . '/utils/wp-version-resolver.php' );
 
-		$this->assertEquals( $expected, $output );
+		$this->assertSame( $expected, $output );
 
 		// Reset the environment variable.
 		putenv( 'WP_VERSION' );