Release 0.18.0-rc #708

Job	Run time
feature_check (ubuntu-latest)	25s
powerpc_cross	44s
feature_check (unstable, ubuntu-latest)	26s
feature_check (unstable, macos-latest)	25s
feature_check (benchmarks, ubuntu-latest)	23s
feature_check (benchmarks, macos-latest)	26s
feature_check (macos-latest)	35s
test_all (macos-latest)	2m 53s
rustfmt	8s
test_all (ubuntu-latest)	3m 3s
build (1.65.0, windows-latest)	3m 43s
build (stable, ubuntu-latest)	15s
build (1.65.0, macos-latest)	2m 43s
build (stable, windows-latest)	31s
build (1.65.0, ubuntu-latest)	2m 37s
build (beta, windows-latest)	40s
build (beta, ubuntu-latest)	14s
build (stable, macos-latest)	13s
build (nightly, windows-latest)	47s
build (nightly, ubuntu-latest)	15s
build (beta, macos-latest)	18s
build (nightly, macos-latest)	21s
	22m 5s

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