build

fix: Error on `{Array,Group}::[async_]open[_opt]` with additional fields with `"must_understand": true` #988

Job	Run time
build_and_test_macos (macos-13)	2m 11s
build_and_test (stable, --features "")	1m 55s
build_and_test_macos (macos-latest)	1m 18s
clippy	1m 52s
build_and_test (stable, --all-features)	2m 21s
build_and_test_windows	3m 21s
build_and_test (stable, --no-default-features)	2m 6s
codecov	2m 0s
build_and_test (1.82, --features "")	2m 27s
build_and_test (1.82, --all-features)	3m 1s
fmt	39s
minimal-versions	1m 6s
build_and_test (1.82, --no-default-features)	1m 59s
semver	1m 45s
build_and_test (beta, --features "")	2m 0s
build_and_test (beta, --all-features)	2m 15s
build_and_test (beta, --no-default-features)	1m 31s
build_and_test (nightly, --features "")	1m 52s
build_and_test (nightly, --all-features)	2m 13s
build_and_test (nightly, --no-default-features)	1m 23s
	39m 15s

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