Gitlab access scope `api` must be optional

[GAS85]

Hello dear community,

by first run integration makes proposals how to create a token, it is enough to have only read_api, read_user and read_repository for basic functionality.
Scope api grants complete read/write access to the API and from security purpose should not be used here, even if it used, than read_api, read_user and read_repository are redundant and are not needed. Please add note that api scope is optional.

[julien-nc]

Then api scope should not be asked when using OAuth. Done, pushed, next release coming soon.