chore(lib): small refactoring #2422

Job	Run time
Verify hyper.h is up to date	25s
Check Style	14s
Test with Miri	56s
features	30s
Test C API (FFI)	40s
Check MSRV	51s
minimal-versions	29s
udeps	23s
Test stable on ubuntu-latest	1m 13s
Test stable on windows-latest	2m 16s
Test stable on macOS-latest	1m 28s
Test beta on ubuntu-latest	1m 16s
Test beta on windows-latest	2m 3s
Test beta on macOS-latest	1m 27s
Test nightly on ubuntu-latest	1m 10s
Test nightly on windows-latest	2m 11s
Test nightly on macOS-latest	1m 28s
Check exposed types	21s
Build docs	14s
CI is green	1s
	19m 36s

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