http-mock fails for the path '/' with the newest symfony routers (3.4.8 || 4.0.8)

[sunspikes]

This new change in symfony router (symfony/symfony#26792), now adds an extra check to make sure there are allowed methods configured in case the matching path is '/'.

I am not 100% sure if this is a side effect of a bit hacky approach to rely on app errors (without registering any proper routes) or a possible BC break by the symfony router.

Example test case:

<?php

namespace Tests;

use InterNations\Component\HttpMock\PHPUnit\HttpMockTrait;
use PHPUnit\Framework\TestCase;

class ExampleTest extends TestCase
{
    use HttpMockTrait;

    public static function setUpBeforeClass()
    {
        static::setUpHttpMockBeforeClass('8082', 'localhost');
    }

    public static function tearDownAfterClass()
    {
        static::tearDownHttpMockAfterClass();
    }

    public function setUp()
    {
        $this->setUpHttpMock();
    }

    public function tearDown()
    {
        $this->tearDownHttpMock();
    }

    public function testSimpleRequest()
    {
        $this->http->mock
            ->when()
            ->methodIs('GET')
            ->pathIs('/')
            ->then()
            ->body('mocked body')
            ->end();
        $this->http->setUp();

        $this->assertSame('mocked body', file_get_contents('http://localhost:8082/'));
    }
}

This test will fail because now router will throw a NoConfigurationException