Changed bootable interface to inherit so mock can work on PHPUnit 9.

CHANGELOG.md

@@ -6,6 +6,9 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## Unreleased
 
+### Changed
+- `Bootable_Provider_Interface` to extend `ServiceProviderInterface`, so that it can be mocked in PHPUnit 9
+
 ### Fixed
 - Mustache.php version to resolve issues on PHP 7.4
 

src/Provider/Bootable_Provider_Interface.php

@@ -3,12 +3,13 @@ declare( strict_types=1 );
 
 namespace Rarst\Laps\Provider;
 
+use Pimple\ServiceProviderInterface;
 use Rarst\Laps\Plugin;
 
 /**
  * Interface for providers that need to boot up once plugin is ready to start.
  */
-interface Bootable_Provider_Interface {
+interface Bootable_Provider_Interface extends ServiceProviderInterface {
 
 	/**
 	 * @param Plugin $laps Container instance.

tests/PluginTest.php

@@ -3,7 +3,6 @@
 namespace Rarst\Laps\Tests;
 
 use Brain\Monkey\Functions;
-use Pimple\ServiceProviderInterface;
 use Rarst\Laps\Provider\Bootable_Provider_Interface;
 
 class PluginTest extends LapsTestCase {
@@ -12,7 +11,7 @@ class PluginTest extends LapsTestCase {
 
 		$container = new \Rarst\Laps\Plugin();
 
-		$service = $this->getMockBuilder( [ ServiceProviderInterface::class, Bootable_Provider_Interface::class ] )
+		$service = $this->getMockBuilder( Bootable_Provider_Interface::class )
                         ->getMock();
 
 		$service->expects( $this->once() )