[CVE] Update Nacos 1.0.0 to Nacos 1.2.0(Solve the security problem of the old version of fastsjon) #4753

[Z]

Deal all:
Fastjson1.4.7 referenced by Nacos1.0.0 has a security vulnerability,i updated 
Nacos 1.0.0 to Nacos 1.2.0??Fastjson1.4.7 upgrade to fastjson1.5.8??to 
fix this security 
vulnerability??https://github.com/apache/skywalking/pull/4753


Thanks & Best Regard
Song Zhendong