Add AdditionalHeader handling to ReceiveMessageAsync #26

Job	Run time
build (ubuntu-latest, Release)	2m 22s
build (macos-latest, Debug)	1m 15s
build (windows-latest, Release)	4m 47s
build (windows-latest, Debug)	5m 41s
build (macos-latest, Release)	1m 18s
build (ubuntu-latest, Debug)	2m 21s
publish-coverage	0s
build (windows-latest, Debug)	5m 20s
build (ubuntu-latest, Debug)	2m 21s
build (macos-latest, Release)	1m 18s
build (macos-latest, Debug)	1m 15s
build (windows-latest, Release)	4m 47s
build (ubuntu-latest, Release)	2m 22s
publish-coverage	0s
	35m 7s

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