Tests

Add WeightedIndexTree to dist_randr (#1372) #653

Job	Run time
Check doc	1m 7s
test-miri	2m 56s
test (ubuntu-latest, x86_64-unknown-linux-gnu, stable)	1m 3s
test-cross (ubuntu-latest, powerpc-unknown-linux-gnu, stable)	1m 29s
test (macos-latest, x86_64-apple-darwin, stable)	2m 45s
test (windows-latest, x86_64-pc-windows-gnu, stable)	2m 0s
test-ios	27s
test (windows-latest, x86_64-pc-windows-msvc, beta)	1m 58s
test (ubuntu-latest, x86_64-unknown-linux-gnu, MSRV, 1.60.0)	4m 1s
test-no-std	11s
test (ubuntu-latest, sudo apt-get update ; sudo apt install gcc-multilib, i686-unknown-linux-gnu,...	46s
test (ubuntu-latest, x86_64-unknown-linux-gnu, nightly, minimal_versions)	34s
	19m 17s

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