Add repr(transparent) to hyper_context #2475

Job	Run time
Verify hyper.h is up to date	20s
Check Style	4s
semver	15s
Check MSRV	1m 9s
Test stable on ubuntu-latest	1m 9s
features	40s
Test stable on windows-latest	2m 55s
Test C API (FFI)	19s
minimal-versions	32s
Test stable on macOS-latest	1m 38s
Test beta on ubuntu-latest	1m 13s
Test with Miri	1m 0s
udeps	28s
Test beta on windows-latest	1m 55s
Test beta on macOS-latest	2m 21s
Test nightly on ubuntu-latest	1m 10s
Test nightly on windows-latest	2m 0s
Test nightly on macOS-latest	2m 14s
Check exposed types	16s
Build docs	18s
CI is green	0s
	21m 56s

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