feat: add eip2124 forkid #85

Job	Run time
doctest	39s
clippy	25s
docs	35s
cfg-check	21s
feature-checks	44s
fmt	10s
no-std	18s
test ubuntu-latest stable --no-default-features	20s
wasm-unknown	50s
wasm-wasi	19s
test ubuntu-latest stable	19s
test ubuntu-latest stable --all-features	32s
test ubuntu-latest nightly --no-default-features	32s
test ubuntu-latest nightly	30s
test ubuntu-latest nightly --all-features	38s
test ubuntu-latest 1.81 --no-default-features	22s
test ubuntu-latest 1.81	24s
test windows-latest stable --no-default-features	1m 54s
test windows-latest stable	1m 53s
test windows-latest stable --all-features	1m 37s
test windows-latest nightly --no-default-features	1m 10s
test windows-latest nightly	1m 18s
test windows-latest nightly --all-features	1m 37s
test windows-latest 1.81 --no-default-features	1m 0s
test windows-latest 1.81	56s
	19m 23s

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