Github deprecation API warning

Hello,

I'm getting these emails since a few weeks about a deprecated API being used in my website, and I suspect it might be pinned down to this plugin specifically.
Here's the full email text:
```
Hi,

On February 13th, 2020 at 08:34 (UTC) your personal access token (grav) using php-github-api (http://github.com/KnpLabs/php-github-api) was used as part of a query parameter to access an endpoint through the GitHub API:

https://api.github.com/repositories//releases

Please use the Authorization HTTP header instead, as using the `access_token` query parameter is deprecated and will be removed July 1st, 2020.

Depending on your API usage, we'll be sending you this email reminder once every 3 days for each token and User-Agent used in API calls made on your behalf.
Just one URL that was accessed with a token and User-Agent combination will be listed in the email reminder, not all.

Visit https://developer.github.com/changes/2019-11-05-deprecated-passwords-and-authorizations-api/#authenticating-using-query-parameters for more information.

Thanks,
The GitHub Team
```

Do you confirm this might come from your plugin, and if so advise?
Thanks
Marco