bigdecimal与golang中类型对应关系问题？


**What happened**:
linked to： https://github.com/apache/dubbo-go/issues/109

**What you expected to happen**:
encode/decode support for java Bigdecimal

**How to reproduce it (as minimally and precisely as possible)**:

**Anything else we need to know?**:
