TASK: Update dependency execa to v6

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
execa	3.4.0 -> 6.1.0

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Release Notes

sindresorhus/execa

v6.1.0

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• Support AbortController (#​490) c6e791a
• Allow cwd and localDir options to be URLs (#​492) 93ab929

v6.0.0

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Breaking

• Require Node.js 12.20 (#​478) 7707880
• This package is now pure ESM. Please read this.
• Moved from a default export to named exports.
  • require('execa') → import {execa} from 'execa'
  • require('execa').sync → import {execaSync} from 'execa'
  • require('execa').command → import {execaCommand} from 'execa'
  • require('execa').commandSync → import {execaCommandSync} from 'execa'
  • require('execa').node → import {execaNode} from 'execa'

v5.1.1

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• Fix error message when user passes a single array argument (#​468) 2b9c0e1

v5.1.0

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• Add .escapedCommand property to the results (#​466) 712bafc

v5.0.1

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• Fix timeout option validation (#​463) 427c5c2

v5.0.0

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Breaking

• Remove faulty emulated ENOENT error on Windows (#​447) bdbd975
  This is only a breaking change if you depend on the exact error message.

Improvements

• Upgrade dependencies 5d64878

v4.1.0

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• Remove --inspect & --inspect-brk from execArgv (#​435) 8fd3f64

v4.0.3

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• Fix use of floating number for the timeout and forceKillAfterTimeout options (#​431) 9a157b3

v4.0.2

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Bug fixes

• Fix with third-party promises (like bluebird) not working (#​427)

v4.0.1

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Bug fixes

• Fix checking for Error instances (#​423)

v4.0.0

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Breaking changes

• Require Node.js 10 (5a9c76f)
• Add stderr and stdout to error.message. A new property error.shortMessage is now available to retrieve the error message without stderr nor stdout (#​397)

Bug fixes

• Fix childProcess.kill() not working with Electron (#​400)

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