Adding support for nodejs16 and nodejs18

[gligorkot]

What did you implement:

Adding support for Nodejs 18

How did you implement it:

Following a template that others have followed

How can we verify it:

Use it to deploy a nodejs18 function app to Azure.

Todos:

Note: Run npm run test:ci to run all validation checks on proposed changes

• [x] Ensure there are no lint errors.
  Validate via npm run lint
  Note: Some reported issues can be automatically fixed by running npm run lint:fix
• [x] Write tests and confirm existing functionality is not broken.
  Validate via npm test
• [x] Write documentation
• [x] Provide verification config / commands / resources
• [x] Enable "Allow edits from maintainers" for this PR
• [x] Update the messages below

Is this ready for review?: YES Is it a breaking change?: NO

[gligorkot]

@medikoo this is now updated and ready for re-review

[gligorkot]

@medikoo any chance we can get a new release tagged for these changes you've just merged please? 🙏

[medikoo]

@gligorkot Currently validating this repository is broken, and i think we should fix it before pursuing any release.

I've created an issue describing what needs to be done: https://github.com/serverless/serverless-azure-functions/issues/645