update readme

Author: a710128

README.md

@@ -28,6 +28,7 @@
 </div>
 
 ## What's New
+- 2022/12/15 **BMTrain** [0.2.0](https://github.com/OpenBMB/BMTrain/releases/tag/0.2.0) released. See the [update log](docs/UPDATE_0.2.0.md).
 - 2022/06/14 **BMTrain** [0.1.7](https://github.com/OpenBMB/BMTrain/releases/tag/0.1.7) released. ZeRO-2 optimization is supported!
 - 2022/03/30 **BMTrain** [0.1.2](https://github.com/OpenBMB/BMTrain/releases/tag/0.1.2) released. Adapted to [OpenPrompt](https://github.com/thunlp/OpenPrompt)and [OpenDelta](https://github.com/thunlp/OpenDelta).
 - 2022/03/16 **BMTrain** [0.1.1](https://github.com/OpenBMB/BMTrain/releases/tag/0.1.1) has publicly released the first stable version, which fixes many bugs that were in the beta version.

setup.py

@@ -73,7 +73,7 @@ def get_device_cc():
 
 setup(
     name='bmtrain',
-    version='0.1.8',
+    version='0.2.0',
     author="Guoyang Zeng",
     author_email="[email protected]",
     description="A toolkit for training big models",