Continuation from #110: Add get_guild_ban and fix typo, cast into struct.

[jchristgit]

iex(2)> Nostrum.Api.get_guild_ban(x, y)
{:ok,
 %Nostrum.Struct.Guild.Ban{
   reason: "spamming",
   user: %Nostrum.Struct.User{
     avatar: "xxxx",
     bot: nil,
     discriminator: "0000",
     email: nil,
     id: zzzz,
     mfa_enabled: nil,
     public_flags: %Nostrum.Struct.User.Flags{
       bug_hunter_level_1: false,
       bug_hunter_level_2: false,
       early_supporter: false,
       hypesquad_balance: false,
       hypesquad_bravery: true,
       hypesquad_brilliance: false,
       hypesquad_events: false,
       partner: false,
       staff: false,
       system: false,
       team_user: false,
       verified_bot: false,
       verified_developer: false
     },
     username: "gggg",
     verified: nil
   }
 }}

[Kraigie]

SEND IT BUD

[jchristgit]

Thanks!