feat(Teams): backport support for teams (#3357)

* feat(Teams): backport support for teams

PR #3350
Commit: a22aabf6a8

* fix(TeamMember): fix name of client property

* refactor(OAuth2Application): make team nullable instead of optional

* typings(OAuth2Application): make team nullable instable of optional

* docs(OAuth2Application): deprecate and add an info to team property

src/util/Constants.js

@@ -216,6 +216,7 @@ const Endpoints = exports.Endpoints = {
       AppAsset: (clientID, hash) => `${root}/app-assets/${clientID}/${hash}.png`,
       GDMIcon: (channelID, hash) => `${root}/channel-icons/${channelID}/${hash}.jpg?size=2048`,
       Splash: (guildID, hash) => `${root}/splashes/${guildID}/${hash}.jpg`,
+      TeamIcon: (teamID, hash) => `${root}/team-icons/${teamID}/${hash}.jpg`,
     };
   },
   OAUTH2: {
@@ -853,3 +854,16 @@ exports.DefaultMessageNotifications = [
   'ALL',
   'MENTIONS',
 ];
+
+/**
+ * The value set for a team members's membership state:
+ * * INVITED
+ * * ACCEPTED
+ * @typedef {string} MembershipStates
+ */
+exports.MembershipStates = [
+  // They start at 1
+  null,
+  'INVITED',
+  'ACCEPTED',
+];