change version to v2.1.1

revert: revert go-kratos#1544 (go-kratos#1548)

add version v2.0.5

change to v2.0.4

update release version (go-kratos#1262)

add codecov (go-kratos#1195)

change version to 2.0.1

add v2.0.0

兼容 google.golang.org/grpc v1.39 版本更新 (go-kratos#1156)

fix: go-kratos#602

Feat/fix examples (go-kratos#1129)

remove github protobuf dependency