aes: bump `hex-literal` to v0.4 #259

Job	Run time
build (1.65.0, thumbv7em-none-eabi)	2m 3s
build (1.65.0, wasm32-unknown-unknown)	2m 0s
build (stable, thumbv7em-none-eabi)	14s
test (1.65.0)	2m 8s
build (stable, wasm32-unknown-unknown)	19s
test (stable)	20s
minimal-versions / minimal-versions	25s
	7m 29s

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