der

remove git dependencies to ecdsa and p256 (#1530) #3072

Job	Run time
build (1.71.0, thumbv7em-none-eabi)	1m 34s
build (1.71.0, wasm32-unknown-unknown)	1m 28s
derive (1.71.0)	22s
minimal-versions	0s
build (stable, thumbv7em-none-eabi)	1m 31s
derive (stable)	14s
build (stable, wasm32-unknown-unknown)	1m 12s
test (i686-unknown-linux-gnu, ubuntu-latest, 1.71.0, sudo apt update && sudo apt install gcc-mult...	10m 53s
test (i686-unknown-linux-gnu, ubuntu-latest, stable, sudo apt update && sudo apt install gcc-mult...	10m 25s
test (x86_64-unknown-linux-gnu, ubuntu-latest, 1.71.0)	10m 25s
test (x86_64-unknown-linux-gnu, ubuntu-latest, stable)	10m 5s
	48m 9s

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