Update elliptic-curve and shlex #1070

Job	Run time
lint	14s
deny (advisories)	40s
build-all-features (stable)	1m 16s
build-all-features (beta)	1m 11s
deny (bans licenses sources)	44s
build-no-alloc (thumbv6m-none-eabi)	1m 14s
build-all-features (nightly-2023-10-01)	1m 15s
build (stable)	1m 20s
build-no-alloc (thumbv7m-none-eabi)	1m 11s
build-no-alloc (thumbv8m.main-none-eabi)	1m 16s
build (beta)	1m 12s
clippy (stable)	57s
build (nightly-2023-10-01)	1m 13s
coverage	1m 28s
build-no-alloc (aarch64-linux-android)	1m 16s
clippy (beta)	1m 3s
build-no-alloc (aarch64-apple-ios)	1m 13s
build-no-alloc (wasm32-unknown-unknown)	1m 24s
doc (stable)	42s
sort	36s
doc (beta)	47s
test (stable)	1m 44s
test (beta)	1m 24s
test (nightly-2023-10-01)	1m 44s
	27m 4s

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