Update NodeJS and NPM versions

[alexgibson]

Description

When installing bedrock using NPM v7 or greater via npm install, a warning is given in the terminal:

npm WARN old lockfile 
npm WARN old lockfile The package-lock.json file was created with an old version of npm,
npm WARN old lockfile so supplemental metadata must be fetched from the registry.
npm WARN old lockfile 
npm WARN old lockfile This is a one-time fix-up, please be patient...
npm WARN old lockfile 

Given that the latest NPM release is now v8, and the latest Node LTS release is now v16, we should update both dependencies in bedrock.

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Success Criteria

• Node is updated to v16 (LTS release)
• NPM is updated to v8 or greater.