Release v1.2.x

[kevwan]

framework:

1. suported Kubernetes based service discovery, use k8s://namespace/service:port as the RPC Target value. More service discovery solutions can be supported by plugins.
2. logging arbitary value with json format, use logx.Infov/Errorv/Slowv.
3. disable stat logs by calling logx.DisableStat().
4. bug fixes and improvements.

goctl:

1. optimize code generation for mongodb without cache
2. optimize environment check before grpc code generation
3. optimize naming specification in model
4. print errors along with the goctl version and details
5. goctl 生成 rpc服务时，message中嵌套message的问题 #915 resolve inline message code generation in grpc
6. 使用goctl生成带有cache的模板时，通过索引查询时发生主键类型错误 #925, 自定义模板文件生成后import错误包 #929 optimize data type conversion for mysql in case NULL column
7. goctl生成代码的import包路径错误 #968 read the destination path from symbol link

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This discussion was created from the release Release v1.2.0.

[kevwan]

Feedbacks are welcome!