Several improvements to the client #244

Job	Run time
Build Docker image	3m 34s
Audit dependencies	24s
Clippy (x86_64-unknown-linux-gnu, false)	1m 11s
Build and test (stable, x86_64-unknown-linux-gnu, ubuntu-latest, --all-features)	4m 50s
Clippy (aarch64-unknown-linux-gnu, true, -target aarch64-linux-gnu -g)	1m 28s
Check unused dependencies	1m 5s
Build and test (msrv, x86_64-unknown-linux-gnu, ubuntu-latest, --all-features)	4m 58s
Format	12s
Clippy (armv7-unknown-linux-gnueabihf, true, -target arm-linux-gnueabihf -mcpu=generic+v7a+vfp3-d...	1m 29s
Build and test (stable, x86_64-unknown-linux-musl, ubuntu-latest, --all-features)	4m 47s
Clippy (x86_64-unknown-linux-musl, true, -target x86_64-linux-musl)	1m 29s
Build and test (stable, aarch64-unknown-linux-gnu, ubuntu-latest, --all-features)	4m 58s
Build and test (stable, x86_64-unknown-linux-gnu, ubuntu-latest, --no-default-features --features...	4m 40s
Build and test (stable, x86_64-unknown-linux-gnu, ubuntu-latest, --no-default-features --features...	4m 54s
	39m 59s

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