OldFangDong

This PR solves the dependency problem, so why is there no merge yet?

https://github.com/realm/realm-swift/issues/7828#event-6787329095 RealmSwift 10.28.1 published

> Hey @caiyue1993 , any chance we could merge it in? He told me , maybe we have a branch use 10.2x RealmSwift.

> @hdcola , this is a great idea! We could make e.g. "master -> 4.x.x" (or whichever is stable) and create a new permanent branch e.g. "next -> 10.2x.x" and...

I have three tplink hs200 switches that have such a log when loading accessories: ``` [11/15/2019, 3:33:22 PM] Loading 1 accessories... [11/15/2019, 3:33:22 PM] [TplinkSmarthome] Configuring cached accessory: [客厅灯] 80064A6B2D5D125DEEB1CE1BBECC024119AD9496...