GrantInterface Exception always false

[kevindierkx]

The elseif statement checking if the $grant is an instance of Grant\GrantInterface always returns false since Grant\GrantInterface isn't even available.

Im talking about the following snippet:

} elseif ( ! $grant instanceof Grant\GrantInterface) {
    throw new \InvalidArgumentException($grant.' is not an instance of \OAuth2\Client\Grant\GrantInterface');
}

Replacing Grant\GrantInterface with \OAuth2\Client\Grant\GrantInterface resolves the issue.
Is this correct or am I doing something wrong here?

[TomHAnderson]

Yes: what you were doing wrong was reporting and not PRing

Fixed with #72