Set npm version to v11.x

[cmenon12]

Description

Set the npm version to v11.x. This is to try and resolve issues with Dependabot updates.

This is the version used by Dependabot.

Also see #90.

Related issues: none

Checklist before marking as ready for review

Before marking as ready for review, please check that you have:

• Added appropriate and passing tests for the changes I made.
• Not broken any existing functionality or tests.
• Not introduced any new linting or formatting errors.
• Only added new dependencies that are necessary, do not introduce security vulnerabilities, and with tilde (~) version ranges.
• Checked and resolved UI accessibility issues using Axe devtools. Unresolved issues are described above.
• Updated the documentation if necessary.

Check the contributing guidelines for more details.

Screenshots (if appropriate)