Update dependency karma-junit-reporter to v2 (master)

[appcues-wss]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
karma-junit-reporter	^1.0.0 -> ^2.0.1

By merging this PR, the below vulnerabilities will be automatically resolved:

Severity	CVSS Score	CVE
High	7.5	WS-2018-0625

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Release Notes

karma-runner/karma-junit-reporter (karma-junit-reporter)

v2.0.1

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2.0.1 (2019-10-07)

v2.0.0

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Bug Fixes

• allow special characters and emoji in output (59fd3c6)

Chores

• travis: Drop old nodejs version: NO v10 (#​164) (bc07177)
• remove support for node 6 (435cb5e)

Features

• support for new XML format (per SonarQube) (b0984e0)

BREAKING CHANGES

• Drop Support for Node 6, to make it possible to use async/await in karma codebase.

• travis: no support for node < 6

• node 10 not supported by libxmljs-mt

v1.2.0

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Bug Fixes

• initialize var suites early (e09acb2)
• release memory held by a testsuite after we're done with it. (eacf8bb)
• remove unnecessary nulling out of suites (4202ee8), closes #​99

v1.1.0

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Bug Fixes

• add defensive checks to safely handle browser disconnects. (485d87a)

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