feat: add new macro to support async client #454

Job	Run time
security-audit	3m 10s
linters (ubuntu-latest)	1m 36s
unit-test (ubuntu-latest)	3m 49s
linters (macos-latest)	1m 20s
build-examples (ubuntu-latest)	2m 21s
unit-test (macos-latest)	2m 3s
build-examples (macos-latest)	1m 46s
build-examples (windows-2019)	6m 29s
unit-test (windows-2019)	6h 0m 9s
ci	0s
	6h 22m 43s

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