feat: add has_eip155_value convenience function to signature (#791) #2131

Job	Run time
test ubuntu-latest stable --no-default-features	1m 22s
miri --no-default-features	4m 44s
wasm	38s
test ubuntu-latest stable	1m 22s
miri	4m 35s
test ubuntu-latest nightly --no-default-features	47s
miri --all-features	6m 56s
test ubuntu-latest nightly	48s
test ubuntu-latest 1.79 --no-default-features	41s
check no_std	50s
test ubuntu-latest 1.79	43s
clippy	48s
test windows-latest stable --no-default-features	2m 20s
docs	2m 38s
test windows-latest stable	3m 1s
features stable	2m 11s
test windows-latest nightly --no-default-features	2m 6s
features stable --all-targets	3m 34s
features nightly	1m 30s
features nightly --all-targets	2m 53s
test windows-latest nightly	1m 45s
test windows-latest 1.79 --no-default-features	1m 13s
test windows-latest 1.79	1m 53s
fmt	13s
test ubuntu-latest 1.79 --features json	42s
test windows-latest 1.79 --features json	1m 48s
test ubuntu-latest nightly --all-features	1m 6s
test windows-latest nightly --all-features	2m 28s
	55m 35s

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