Add NTPv5 support to `Peer` #36

Job	Run time
Check unused dependencies	1m 47s
Build and test (stable, ubuntu-latest, x86_64-unknown-linux-gnu)	3m 55s
Build and test (beta, ubuntu-latest, x86_64-unknown-linux-gnu)	1m 53s
Audit dependencies	41s
Format	10s
Build and test (1.66.0, ubuntu-latest, x86_64-unknown-linux-gnu)	1m 58s
Clippy (x86_64-unknown-linux-gnu, false, true)	16s
Build and test (stable, ubuntu-latest, x86_64-unknown-linux-musl)	2m 45s
Build and test (stable, macos-latest, x86_64-apple-darwin)	2m 33s
Clippy (armv7-unknown-linux-gnueabihf, true, false, -target arm-linux-gnueabihf -mcpu=generic+v7a...	19s
Smoke-test fuzzing targets	4m 56s
Build and test (stable, ubuntu-latest, --features ntpv5, x86_64-unknown-linux-gnu)	2m 50s
Clippy (x86_64-unknown-linux-musl, true, false, -target x86_64-linux-musl)	18s
Validate man pages	13s
Smoke-test fuzzing targets (--features ntpv5)	2m 47s
Build and test (1.66.0, ubuntu-latest, --features ntpv5, x86_64-unknown-linux-gnu)	1m 46s
Clippy (x86_64-apple-darwin, true, false, -target x86_64-macos-gnu -g)	18s
Build and test (stable, ubuntu-latest, --features ntpv5, x86_64-unknown-linux-musl)	3m 13s
Validate configs	1m 1s
Build and test (stable, macos-latest, --features ntpv5, x86_64-apple-darwin)	1m 36s
	35m 15s

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