elliptic-curve: fix `hkdf` version requirement and test in CI (#1353) #1541

Job	Run time
build (1.60.0, thumbv7em-none-eabi)	3m 29s
minimal-versions	59s
build (1.60.0, wasm32-unknown-unknown)	4m 14s
build (stable, thumbv7em-none-eabi)	22s
test (1.60.0)	4m 16s
build (stable, wasm32-unknown-unknown)	17s
test (stable)	25s
	14m 2s

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