Merge pull request #132 from driftluo/support-async-client #460

Job	Run time
security-audit	3m 9s
linters (ubuntu-latest)	2m 36s
linters (macos-latest)	1m 19s
build-examples (ubuntu-latest)	2m 10s
unit-test (ubuntu-latest)	3m 43s
build-examples (macos-latest)	1m 46s
unit-test (macos-latest)	2m 9s
build-examples (windows-2019)	5m 19s
unit-test (windows-2019)	6m 47s
ci	1s
	28m 59s

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