Lint sdk

Bump golang.org/x/sync from 0.8.0 to 0.10.0 in /grid-client #2366

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Run time

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Job	Run time
Run Lint (activation-service)	44s
Run Lint (farmerbot)	51s
Run Lint (grid-cli)	42s
Run Lint (grid-client)	40s
Run Lint (grid-proxy)	47s
Run Lint (gridify)	44s
Run Lint (monitoring-bot)	34s
Run Lint (rmb-sdk-go)	38s
Run Lint (user-contracts-mon)	35s
Run Lint (tfrobot)	43s
	6m 58s