feat: Add if-match & if-none-match support for reader (#5492) #2242

Job	Run time
build_all_features	4m 55s
build_all_platforms (ubuntu-latest)	2m 41s
build_all_platforms (macos-latest)	2m 41s
build_default_features (ubuntu-latest)	35s
build_under_wasm	43s
build_all_platforms (windows-latest)	4m 31s
build_default_features (macos-latest)	47s
check_clippy	4m 12s
check_docs	3m 26s
check_msrv	34s
build_default_features (windows-latest)	1m 19s
unit	6m 26s
	32m 50s

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