Merge pull request #31 from ZoroWang/master

Update to 8.1.2

Author: yushulx

README.md

@@ -30,7 +30,7 @@
 
 ### Version
 
-- **8.1**
+- **8.1.2**
 
 ### Supported Platforms
 - **Windows x64**
@@ -47,6 +47,8 @@
 
 - **Python3.8**
 
+- **Python3.9**
+
 ### Installation
 
 >**pip install dbr** or **pip3 install dbr**