Trying to get coverage report

Hi,

It seems that using the Rest module with Phpbrowser does not work for 'coverage'

Example running `bin/codecept run --coverage --coverage-xml --coverage-html` :

Here is the config of `api.suite.yml` :

```
class_name: ApiTester
coverage:
enabled: true
remote: true
remote_context_options:
http:
timeout: 60
ssl:
verify_peer: false
modules:
enabled:
- Asserts
- Symfony:
kernel_class: App\Kernel
app_path: 'src'
environment: 'test'
- REST:
depends: PhpBrowser
- Doctrine2:
depends: Symfony
cleanup: true
```

We are mainly using the `send()` method of the `ApiTesterActions`.

We followed the doc here : https://codeception.com/docs/11-Codecoverage

We also followed the instructions to installed the `c3.php` file (https://github.com/Codeception/c3)

What are we missing ?

Thanks in advance for your help,
Julien