build

feat: add interface stubs for async adapters #463

Job	Run time
Run Linters	1m 41s
test (3.9, ubuntu-latest)	1m 13s
test (3.9, macOS-latest)	1m 25s
test (3.9, windows-latest)	1m 22s
test (3.10, ubuntu-latest)	1m 10s
test (3.10, macOS-latest)	1m 48s
test (3.10, windows-latest)	1m 32s
test (3.11, ubuntu-latest)	53s
test (3.11, macOS-latest)	1m 32s
test (3.11, windows-latest)	1m 34s
Indicate completion to coveralls.io	16s
Release	19s
	14m 45s

Provide feedback