Update dependency mixin-deep to 1.3.2 - autoclosed

[mend-for-github-com[bot]]

This PR contains the following updates:

Package	Change
mixin-deep	1.3.1 -> 1.3.2

By merging this PR, the below issues will be automatically resolved and closed:

Severity	CVSS Score	CVE	GitHub Issue
Critical	9.8	CVE-2019-10746	#12

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Configuration

📅 Schedule: Branch creation - "" (UTC), Automerge - At any time (no schedule defined).

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♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

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