[Security] Bump debug from 2.6.6 to 2.6.9

[dependabot-preview]

Bumps debug from 2.6.6 to 2.6.9. This update includes a security fix.

Vulnerabilities fixed

Sourced from The GitHub Security Advisory Database.

Low severity vulnerability that affects debug The debug module is vulnerable to regular expression denial of service when untrusted user input is passed into the o formatter. It takes around 50k characters to block for 2 seconds making this a low severity issue.

Affected versions: < 2.6.9

Release notes

Sourced from debug's releases.

2.6.9

Patches

• Remove ReDoS regexp in %o formatter: #504

Credits

Huge thanks to @zhuangya for their help!

release 2.6.7

No release notes provided.

Changelog

Sourced from debug's changelog.

2.6.9 / 2017-09-22

• remove ReDoS regexp in %o formatter (#504)

2.6.8 / 2017-05-18

• Fix: Check for undefined on browser globals (#462, @marbemac)

2.6.7 / 2017-05-16

• Fix: Update ms to 2.0.0 to fix regular expression denial of service vulnerability (#458, @hubdotcom)
• Fix: Inline extend function in node implementation (#452, @dougwilson)
• Docs: Fix typo (#455, @msasad)

2.6.5 / 2017-04-27

• Fix: null reference check on window.documentElement.style.WebkitAppearance (#447, @thebigredgeek)
• Misc: clean up browser reference checks (#447, @thebigredgeek)
• Misc: add npm-debug.log to .gitignore (@thebigredgeek)

2.6.4 / 2017-04-20

• Fix: bug that would occure if process.env.DEBUG is a non-string value. (#444, @LucianBuzzo)
• Chore: ignore bower.json in npm installations. (#437, @joaovieira)
• Misc: update "ms" to v0.7.3 (@tootallnate)

2.6.3 / 2017-03-13

• Fix: Electron reference to process.env.DEBUG (#431, @paulcbetts)
• Docs: Changelog fix (@thebigredgeek)

2.6.2 / 2017-03-10

• Fix: DEBUG_MAX_ARRAY_LENGTH (#420, @slavaGanzin)
• Docs: Add backers and sponsors from Open Collective (#422, @piamancini)
• Docs: Add Slackin invite badge (@tootallnate)

2.6.1 / 2017-02-10

• Fix: Module's export default syntax fix for IE8 Expected identifier error
• Fix: Whitelist DEBUG_FD for values 1 and 2 only (#415, @pi0)

... (truncated)

Commits

• 13abeae Release 2.6.9
• f53962e remove ReDoS regexp in %o formatter (#504)
• 52e1f21 Release 2.6.8
• 2482e08 Check for undefined on browser globals (#462)
• 6bb07f7 release 2.6.7
• 15850cb Fix Regular Expression Denial of Service (ReDoS)
• 4a6c85c update "debug" to v1.0.0 (#454)
• b68dbf8 Fix typo (#455)
• 1351d2f Inline extend function in node implementation (#452)
• See full diff in compare view

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[colbygk]

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This seems to cause a single test to fail, investigating

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