Add NTPv5 support to `Peer` #35

Job	Run time
Clippy (x86_64-unknown-linux-gnu, false, true)	23s
Audit dependencies	34s
Build and test (stable, ubuntu-latest, x86_64-unknown-linux-gnu)	2m 56s
Format	11s
Build and test (beta, ubuntu-latest, x86_64-unknown-linux-gnu)	1m 35s
Clippy (armv7-unknown-linux-gnueabihf, true, false, -target arm-linux-gnueabihf -mcpu=generic+v7a...	29s
Build and test (1.66.0, ubuntu-latest, x86_64-unknown-linux-gnu)	2m 1s
Smoke-test fuzzing targets	4m 56s
Clippy (x86_64-unknown-linux-musl, true, false, -target x86_64-linux-musl)	28s
Validate man pages	10s
Build and test (stable, ubuntu-latest, x86_64-unknown-linux-musl)	3m 25s
Smoke-test fuzzing targets (--features ntpv5)	3m 29s
Clippy (x86_64-apple-darwin, true, false, -target x86_64-macos-gnu -g)	26s
Build and test (stable, macos-latest, x86_64-apple-darwin)	1m 45s
Build and test (stable, ubuntu-latest, --features ntpv5, x86_64-unknown-linux-gnu)	2m 37s
Check unused dependencies	1m 53s
Validate configs	1m 2s
Build and test (1.66.0, ubuntu-latest, --features ntpv5, x86_64-unknown-linux-gnu)	1m 47s
Build and test (stable, ubuntu-latest, --features ntpv5, x86_64-unknown-linux-musl)	2m 46s
Build and test (stable, macos-latest, --features ntpv5, x86_64-apple-darwin)	1m 53s
	34m 46s

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