feat: add new macro to support async client #449

Job	Run time
security-audit	3m 10s
unit-test (ubuntu-latest)	3m 55s
build-examples (ubuntu-latest)	2m 15s
unit-test (macos-latest)	2m 53s
linters (ubuntu-latest)	1m 38s
build-examples (macos-latest)	2m 2s
unit-test (windows-2019)	6h 0m 11s
linters (macos-latest)	1m 20s
build-examples (windows-2019)	5m 5s
ci	0s
	6h 22m 29s

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