Update dependency stringstream to v0.0.6

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

This PR contains the following updates:

Package	Type	Update	Change
stringstream	dependencies	patch	0.0.1 -> 0.0.6

By merging this PR, the issue #47 will be automatically resolved and closed:

Severity	CVSS Score	CVE
Medium	6.5	CVE-2018-21270
Medium	4.8	WS-2018-0103

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Release Notes

mhart/StringStream (stringstream)

### [`v0.0.6`](https://togithub.com/mhart/StringStream/compare/v0.0.5...v0.0.6) [Compare Source](https://togithub.com/mhart/StringStream/compare/v0.0.5...v0.0.6)

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