Added security implementation according OpenAPI 3.1.0 specification

[romalytvynenko]

This would allow defining all the security rules that allowed by OpenAPI 3.1.0 specification.

For example, the specification allows defining auth methods that require few headers which previously was not possible in Scramble.

Now it becomes possible:

Scramble::configure()
    ->withDocumentTransformers(function (OpenApi $openApi) {
        $openApi->components->securitySchemes['tenant'] = SecurityScheme::apiKey('header', 'X-Tenant');
        $openApi->components->securitySchemes['bearer'] = SecurityScheme::http('bearer');

        $openApi->security[] = new SecurityRequirement([
            'tenant' => [],
            'bearer' => [],
        ]);
    });