End support for Node.js < 18 across projects

[danyalaytekin]

See pa11y/pa11y-webservice-client-node#19 (comment), and Node.js's releases page for key dates.

Each 'Publish' step here will become a PR which includes an update to documentation and metadata.

Summary

• pa11y
  • Update dependencies to resolve Ubuntu issues pa11y#664
  • Release pa11y@7 pa11y#681
• pa11y-ci
  • Update to Pa11y v7 and other dependency updates pa11y-ci#231
  • [Awaiting components] Release pa11y-ci@4 pa11y-ci#232
• pa11y-dashboard
  • Create PR for change
  • Publish 5.0.0
• pa11y-webservice
  • Use Pa11y 7, require Node 18, fix issues pa11y-webservice#149
  • [finishing up] Release pa11y-webservice@5 pa11y-webservice#159
• pa11y-webservice-client-node
  • Update Node.js support to 18-20 from 12-16, dependencies, documentation, some practices pa11y-webservice-client-node#19
  • Release pa11y-webservice-client-node@4 pa11y-webservice-client-node#24
• pa11y-lint-config
  • Update Node.js requirements, ESLint, ruleset names; drop Make pa11y-lint-config#4
  • Release pa11y-lint-config@3 pa11y-lint-config#8

Stretch goal:

• pa11y.github.io