a11ym Support for WCAG needs to be upgraded to WCAG2.1

[kamal2222ahmed]

https://github.com/boozallen/sdp-libraries/tree/main/libraries/a11y shows that it supports WCAG 2.0

a11y
[The A11y Machine](https://github.com/liip/TheA11yMachine) is an automated accessibility testing tool which crawls and tests pages of a web application to produce detailed reports.

It validates pages against the following specifications/laws:

[W3C Web Content Accessibility Guidelines](http://www.w3.org/TR/WCAG20/) (WCAG) 2.0, including A, AA and AAA levels ([understanding levels of conformance](http://www.w3.org/TR/UNDERSTANDING-WCAG20/conformance.html#uc-levels-head))

whereas currently (as of 3/22/2023) use WCAG2.1 as baseline/minimum required version.

[kamal2222ahmed]

as TheA11yMachine is archived and no longer being worked on, perhaps we need to remove / replace the a11y library