Track function rename in ligo.skymap

The function `ligo.skymap.postprocess.find_injection.find_injection_moc`
was renamed to `ligo.skymap.postprocess.crossmatch.crossmatch`.
5 jobs for skymap-crossmatch in 4 minutes and 22 seconds (queued for 1 second)
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passed #748890
build

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  Test
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lint

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passed #748865
test

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sccb

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