v5.1`AuthorizationOptions.scope`Breaking Change

[Lordfirespeed]

related: #305, #306

Version 5.1 changed the accepted type of AuthorizationOptions.scope from string[] to string, which is a breaking change.

[dhensby]

introduced in #267

The only sensible approach is to accept both strings and arrays of strings for this argument.

[Lordfirespeed]

Resolved by #309

[jankapunkt]

Will publish this with a new minor release, once we got #314 merged.