fix recover_signer in consensus crate #49

Job	Run time
cfg-check	57s
docs	1m 6s
clippy	1m 1s
doctest	1m 24s
feature-checks	1m 14s
fmt	13s
no-std	24s
wasm-unknown	24s
test ubuntu-latest stable --no-default-features	2m 5s
wasm-wasi	2m 44s
test ubuntu-latest stable	1m 46s
test ubuntu-latest nightly --no-default-features	1m 53s
test ubuntu-latest nightly	1m 57s
test ubuntu-latest 1.76 --no-default-features	1m 11s
test ubuntu-latest 1.76	1m 18s
test windows-latest stable --no-default-features	3m 25s
test windows-latest stable	3m 43s
test windows-latest nightly --no-default-features	4m 8s
test windows-latest nightly	3m 58s
test windows-latest 1.76 --no-default-features	3m 32s
test windows-latest 1.76	3m 31s
test ubuntu-latest stable --all-features	1m 14s
test ubuntu-latest nightly --all-features	1m 15s
	44m 23s

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