The package is not Packagist registered

[alecpl]

so it can't be easily installed as described in the Readme file.

[adragos]

I can confirm. I am trying to install the package using
composer require syncroton/syncroton

and I get the following error:

 Could not find a matching version of package syncroton/syncroton. Check the package spelling, your version constraint and that the package is available in a stability which matches your minimum-stability (stable).

[maximerenou]

If anybody struggles, here's a common way to help Composer to retrieve an unregistered repository:

    "require": {
        ...
        "syncroton/syncroton": "1.*"
    },
    "repositories": [
        {
            "type": "vcs",
            "url": "https://github.com/tine20/syncroton.git"
        }
    ],