feat: Add `Client.ingest_bytes_opt` #255

Job	Run time
Clippy check	56s
Run tests with async-std on staging	1m 16s
Run tests with Tokio on development	1m 27s
Run tests with async-std on development	1m 21s
Rustfmt check	12s
Run tests with Tokio on staging	1m 25s
Build examples	1m 3s
Publish on crates.io	-1s
	7m 39s

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