Update module github.com/elastic/go-libaudit to v0.4.0 - autoclosed

This MR contains the following updates:

Package	Type	Update	Change
github.com/elastic/go-libaudit	require	minor	v0.3.1-0.20180620154349-0c842c62c7c0 -> v0.4.0

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Configuration

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🔕 Ignore: Close this MR and you won't be reminded about this update again.

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