Prepare v1.5.2 #2938

Job	Run time
semver	14s
Check Style	36s
Verify hyper.h is up to date	34s
features	35s
Test C API (FFI)	1m 10s
minimal-versions	26s
Test cargo-c support (FFI)	26s
Test with Miri	2m 27s
Check MSRV	37s
udeps	34s
Test stable on ubuntu-latest	1m 2s
Test stable on windows-latest	3m 39s
Test stable on macOS-latest	1m 13s
Test beta on ubuntu-latest	1m 13s
Test beta on windows-latest	2m 8s
Test beta on macOS-latest	1m 14s
Test nightly on ubuntu-latest	1m 32s
Test nightly on windows-latest	2m 51s
Test nightly on macOS-latest	1m 16s
Check exposed types	20s
Build docs	37s
CI is green	1s
	24m 45s

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