README: add istio/istio to "Trusted By" section #321
                
     Merged
            
            
          
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Add istio/istio to "Trusted By" section. and fix 'No newline at end of file' git suggestion.
The istio org already use the golangci-lint(https://github.com/istio/istio/blob/913b459130045fc4846a36c46c05a48da88776bb/.golangci.yml). I'm surprised but I like istio's decision :)
I didn't yet the Istio contributors but found yesterday. so send pr to you.
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FYI, If you didn't like the fixed
No newline at end of file, I'll drop that commit.