refactor(common): replace Never with Infallible (#3335) #2179

Job	Run time
Verify hyper.h is up to date	32s
Check Style	8s
Test C API (FFI)	1m 5s
Test with Miri	1m 47s
features	41s
Check MSRV	3m 52s
udeps	29s
Test stable on ubuntu-latest	2m 1s
Test stable on windows-latest	4m 21s
Test stable on macOS-latest	2m 44s
Test beta on ubuntu-latest	1m 56s
Test beta on windows-latest	4m 11s
Test beta on macOS-latest	2m 56s
Test nightly on ubuntu-latest	2m 23s
Test nightly on windows-latest	3m 51s
Test nightly on macOS-latest	2m 10s
Build docs	25s
Check exposed types	29s
CI is green	1s
	36m 2s

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