Bump `cipher` to v0.5.0-pre.1; MSRV 1.65 #397

Job	Run time
build (1.65.0, thumbv7em-none-eabi)	1m 39s
build (1.65.0, wasm32-unknown-unknown)	1m 41s
test (1.65.0)	1m 40s
build (stable, thumbv7em-none-eabi)	20s
test (stable)	17s
build (stable, wasm32-unknown-unknown)	16s
minimal-versions / minimal-versions	26s
	6m 19s

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