Update dependency pa11y to v7

This MR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
pa11y	6.2.3 -> 7.0.0

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Release Notes

pa11y/pa11y (pa11y)

v7.0.0

Compare Source

Changes

• Breaking: Upgrade Node.js support: Pa11y 7 requires a stable (even-numbered) Node.js version of 18 or above
• Breaking: Upgrade dependency puppeteer to 20 from 9: this may affect Pa11y's operating system support and the behaviour of Pa11y's browser automation
• Breaking: Upgrade dependency commander to 11 from 8
• Breaking: Upgrade dependency bfj to 8 from 7
• Upgrade axe-core to ~4.8.2 from ~4.2.1
• Support versions of Ubuntu above 20.04 without further configuration (thanks @​aarongoldenthal)
• Increase confidence in macOS and Windows support (thanks @​aarongoldenthal)
• Fix mistakes in documentation about runners (thanks @​aarongoldenthal)
• Update stale links in documentation (thanks @​gavinr)
• Update support policy

New contributors

• @​gavinr made their first contribution
• @​danyalaytekin made their first contribution

Full diff

• 6.2.3...7.0.0

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