Update `Ciphertext` bindings #458

Job	Run time
yarn-test (stable, wasm32-unknown-unknown)	5m 43s
check	50s
python-test (stable, wasm32-unknown-unknown, 3.10)	1m 57s
wasm-test (1.67, wasm32-unknown-unknown)	7m 30s
wasm-test (stable, wasm32-unknown-unknown)	6m 40s
test (x86_64-unknown-linux-gnu, 1.67)	7m 54s
test (x86_64-unknown-linux-gnu, stable)	4m 10s
codecov	9m 3s
benchmark	0s
	43m 47s

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