IrcBridge.memberListSyncers: Object -> Map

[jaller94]

• TypeScript pretends that for the Object {[foo: string], Bar} every key will return you an Bar, even though undefined is a possibility. The usage of Map shows us that we may need to validate if a MemberListSyncer was returned.
• Protects against the unlikely foot gun that someone configures a __proto__ domain.

[jaller94]

Remaining issues:

src/bridge/IrcBridge.ts:1479:17 - error TS2532: Object is possibly 'undefined'.

1479                 this.memberListSyncers.get(room.getServer().domain).addToLeavePool(
                     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

src/bridge/MatrixHandler.ts:802:27 - error TS2532: Object is possibly 'undefined'.

802                     await this.ircBridge.getMemberListSyncer(ircRoom.server).checkBotPartRoom(
                              ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

src/irc/ClientPool.ts:140:37 - error TS2532: Object is possibly 'undefined'.

140                 chansToJoin = await this.ircBridge.getMemberListSyncer(server).getChannelsToJoin();
                                        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

src/provisioning/Provisioner.ts:1066:16 - error TS2532: Object is possibly 'undefined'.

1066         return this.ircBridge.getMemberListSyncer(server).addToLeavePool(
                    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Found 4 errors in 4 files.

Errors  Files
     1  src/bridge/IrcBridge.ts:1479
     1  src/bridge/MatrixHandler.ts:802
     1  src/irc/ClientPool.ts:140
     1  src/provisioning/Provisioner.ts:1066