Upgrade Mocha to 10

[SpaceFozzy]

When installing the NPM dependencies I see 4 vulnerabilities (1 moderate, 2 high, 1 critical). This is just because the Mocha version is outdated.

This PR updates Mocha from version 5 to version 10. The only breaking change is updating the configuration file that defines the ui as export. Since mocha now requires that the config file goes in the project root, or that you pass a custom path as a param, I added it to thepackage.json for simplicity.

Changes:

• Upgrade mocha from 5 to 10 and add with the new npm-shrinkwrap.json
• Remove the old mocha.opts used to configure Mocha
• Update the package.json with a mocha property containing the Mocha configuration

[GaryWilber]

Thanks for the PR. I updated the package as part of #997