lack of license header in some file.

[ShannonDing]

15 Unknown Licenses

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Files with unapproved licenses:

../rocketmq-client-go/.gitignore
../rocketmq-client-go/.golangci.yml
../rocketmq-client-go/.travis.yml
../rocketmq-client-go/CONTRIBUTING.md
../rocketmq-client-go/PULL_REQUEST_TEMPLATE.md
../rocketmq-client-go/go.mod
../rocketmq-client-go/go.sum
../rocketmq-client-go/consumer/message_util.go
../rocketmq-client-go/docs/Introduction.md
../rocketmq-client-go/docs/client-design.gliffy
../rocketmq-client-go/docs/feature.md
../rocketmq-client-go/examples/consumer/rpc/main.go
../rocketmq-client-go/examples/producer/rpc/async/main.go
../rocketmq-client-go/examples/producer/rpc/sync/main.go
../rocketmq-client-go/internal/request_response_future.go

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