message: fix: export MemberRolesManager from mod.ts
diff: @@ -185,3 +185,4 @@ export * from './src/utils/channelTypes.ts'
  export * from './src/structures/messageSticker.ts'
  export * from './src/utils/oauthURL.ts'
  export * from './src/structures/autocompleteInteraction.ts'
  +export * from './src/managers/memberRoles.ts'
  