Small but breaking stuffs

A lot of stuff

Incl. Request refactoring

GHC-8.6

Long waited updates

0.17.0

GHC-8.2

0.15.0 - lot's of stuff

Few missing endpoints:

- Add `membersOfWithR`, `listTeamMembersR`
- Add related enums: `OrgMemberFilter`, `OrgMemberRole`, `TeamMemberRole`
- Add `Enum` and `Bounded` instances to `Privacy`, `Permission`,
  `RepoPublicity`
- Don't require network access for search tests