build

fix(metadata): Make `AdditionalField` public and permit any JSON type… #970

Job	Run time
build_and_test_windows	4m 12s
build_and_test_macos (macos-13)	3m 10s
clippy	1m 48s
build_and_test (stable, --features "")	2m 48s
build_and_test_macos (macos-latest)	2m 3s
build_and_test (stable, --all-features)	3m 9s
codecov	3m 41s
build_and_test (stable, --no-default-features)	2m 18s
fmt	34s
minimal-versions	2m 43s
build_and_test (1.82, --features "")	2m 40s
build_and_test (1.82, --all-features)	3m 17s
semver	4m 8s
build_and_test (1.82, --no-default-features)	2m 16s
build_and_test (beta, --features "")	2m 32s
build_and_test (beta, --all-features)	3m 6s
build_and_test (beta, --no-default-features)	2m 26s
build_and_test (nightly, --features "")	2m 23s
build_and_test (nightly, --all-features)	2m 55s
build_and_test (nightly, --no-default-features)	2m 1s
	54m 10s

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