chore: auth item chain id is u64 #39

Job	Run time
doctest	14s
clippy	17s
docs	25s
feature-checks	26s
no-std	41s
wasm-unknown	21s
test ubuntu-latest stable --no-default-features	23s
wasm-wasi	20s
test ubuntu-latest stable	24s
test ubuntu-latest stable --all-features	40s
cfg-check	22s
test ubuntu-latest nightly --no-default-features	20s
test ubuntu-latest nightly	19s
fmt	16s
test ubuntu-latest nightly --all-features	38s
test ubuntu-latest 1.79 --no-default-features	28s
test ubuntu-latest 1.79	18s
test windows-latest stable --no-default-features	1m 26s
test windows-latest stable	1m 29s
test windows-latest stable --all-features	1m 51s
test windows-latest nightly --no-default-features	51s
test windows-latest nightly	59s
test windows-latest nightly --all-features	1m 19s
test windows-latest 1.79 --no-default-features	53s
test windows-latest 1.79	51s
	16m 31s

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