Add ZWA-2 and ZBT-2 (#264)

Author: puddly

allocated-pids.txt

@@ -797,4 +797,6 @@ PID    | Product name
 0x8315 | INBRAT - INTR
 0x8316 | INBRAT - INTTR8000
 0x8317 | INBRAT - PVOne
-0x8318 | INBRAT - PVTracer
+0x8318 | INBRAT - PVTracer
+0x8319 | Nabu Casa - Home Assistant Connect ZWA-2
+0x831A | Nabu Casa - Home Assistant Connect ZBT-2