Update dependency tree-kill to v1.2.2 - autoclosed

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

This PR contains the following updates:

Package	Type	Update	Change
tree-kill	dependencies	patch	1.2.1 -> 1.2.2

By merging this PR, the issue #17 will be automatically resolved and closed:

Severity	CVSS Score	CVE
High	9.8	CVE-2019-15599

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Release Notes

pkrumins/node-tree-kill

### [`v1.2.2`](https://togithub.com/pkrumins/node-tree-kill/compare/v1.2.1...v1.2.2) [Compare Source](https://togithub.com/pkrumins/node-tree-kill/compare/v1.2.1...v1.2.2)

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