Update dependency meow to v6

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
meow	dependencies	major	^5.0.0 -> ^6.0.0

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Release Notes

sindresorhus/meow

v6.0.1

Compare Source

• Improve the TypeScript types (#​135) 16640f1

v6.0.0

Compare Source

Breaking

• Require Node.js 8 cd635d4
• Remove flag's aliases from the flags property (#​108) f36715c
• Only consider enabling autoHelp/autoVersion in case there is only one argument in process.argv (#​114) cd29865
• Switch from loud-rejection to hard-rejection f60c26e

Enhancements

• Add TypeScript definition (#​116) f1036df
• Add support for number flag type (#​103) 5ef9478
• Add hardRejection option 2bcfee7

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