chore(2.0): release `v1.0.0-beta.2` #3876

Job	Run time
check-toml	33s
docs	2m 3s
check-all-features / check-all-features	3m 5s
check and test / ubuntu-latest, stable	4m 42s
clippy / ubuntu-latest, stable	2m 24s
format / ubuntu-latest, nightly	51s
	13m 38s

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