Update dependency concurrently to v5

[renovate]

This PR contains the following updates:

Package	Type	Update	New value	References	Sourcegraph
concurrently	devDependencies	major	^5.1.0	source

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Release Notes

kimmobrunfeldt/concurrently

v5.1.0

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• Return exit codes in the programmatic API (#​213)

v5.0.2

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• Update dependencies to get rid of vulnerability in tree-kill

v5.0.1

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• Upgrade dependencies to get rid of vulnerability in os-locale (#​204, #​205)
• bin: remove duplicate entries from usage docs (#​192)

v5.0.0

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Breaking changes

• Timestamp formatting library date-fns was upgraded to v2.0.0 (#​196)

Other changes

• Kill child processes on SIGHUP (#​193, #​195)

v4.1.2

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• Don't strip quotes if they are impaired (#​118, #​194)

v4.1.1

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• bin: pass --prefix-length argument through (#​189)

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