update minFirmwareVersion to 1.3.0

app/src/main/java/com/geeksville/mesh/service/MeshService.kt

@@ -105,7 +105,7 @@ class MeshService : Service(), Logging {
 
         /** The minimmum firmware version we know how to talk to. We'll still be able to talk to 1.0 firmwares but only well enough to ask them to firmware update
          */
-        val minFirmwareVersion = DeviceVersion("1.2.0")
+        val minFirmwareVersion = DeviceVersion("1.3.0")
     }
 
     enum class ConnectionState {