Bump nodemon from version 2.x to 3.1.11 in test-suite

[MartinWheelerMT]

What

• Version of 2 of nodemon contains high vulnerabilities. This updates to using the latest version and updates package.json and package-lock.json accordingly.

Why

nodemon 2.x introduces a vulnerability through it's transitive dependencies. This updates to the latest version of nodemon 3.x which will address this.

Type of change

Please delete options that are not relevant.

• Internal change (non-breaking change with no effect on the functionality affecting end users)

Checklist:

• I have performed a self-review of my code
• I have made corresponding changes to the documentation where required
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have updated the Changelog with details of my change in the UNRELEASED section if this change affects end users.

[github-actions]

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