Upgrade to pa11y-webservice*5 and other more recent dependencies

[danyalaytekin]

Changes

• require Node 20, 22, 24
• test against MongoDB 7 again
• upgrade several dependencies
• remove implicit dependency on request
• remove dependency node-fetch
• reduce vulnerabilities from 29 to 1
• fix double promisify issue in integration tests

Vulnerability hunt

Before

$npm install
...
29 vulnerabilities (7 low, 6 moderate, 12 high, 4 critical)

After

$ npm install
...
1 low severity vulnerability

[josebolos]

Maybe for next time we can split fixing the test on a different PR, but looks good! 👍