update for webhook test

Author: billryan

README.md

@@ -34,6 +34,6 @@ This work is licensed under the **Creative Commons Attribution-ShareAlike 4.0 In
 ## To Do
 
 - [ ] add multiple languages support
-- [ ] add implementations of `Python`, `C++` and `Java` code
+- [ ] add implementations of `Python`, `C++`, `Go` and `Java` code
 - [x] add time and space complexity analysis
 - [x] add proper Chinese fonts for PDF output