How upgrade the NPU Driver ?

[dourenyin]

Now the NPU driver Version is 0.9.7.

Code:

D RKNNAPI: ==============================================
D RKNNAPI: RKNN VERSION:
D RKNNAPI:   API: 1.3.0 (c5654ea build: 2019-12-25 14:12:00)
D RKNNAPI:   DRV: 0.9.7 (d65a37f build: 2019-05-31 14:23:01)
D RKNNAPI: ==============================================

But the Rockchip official lastest version is  1.3.1  （toybirck platform）

Code:

D RKNNAPI: ==============================================
D RKNNAPI: RKNN VERSION:
D RKNNAPI:   API: 1.3.0 (c5654ea build: 2019-12-25 14:12:00)
D RKNNAPI:   DRV: 1.3.1 (6ebb4d7 build: 2020-01-02 09:37:58)
D RKNNAPI: ==============================================

So， how can I upgrade our npu driver version ?