Auth0 deploy v8 migration

[kazemicode]

Migrates auth0-deploy-cli to v8 and auth0 to v4.
Closes #56

To test:

1. Clone this repo, checkout the correct branch and build the vsix:
   git clone https://github.com/auth0-training/labs-vscode-extension.git
git checkout auth0-deploy-v8-migration
cd labs-vscode-extension
npm install (if this step fails, try doing rm -rf node_modules package-lock.json first)
   npm run build:production
npm run package
2. Open https://github.com/auth0-training/labs-node-working-with-spa-applications in a Codespace
3. In the Codespace, uninstall the Auth0 Labs extension.
4. Install the new extension build from vsix (vsix located in the your local clone of the extension repo).
5. Test that you can successfully grant the extension authorization to one of your Auth0 tenants.
6. Test that you can deploy lab resources (Creates the SPA app and API integrations in your tenant).
7. Test that you can run the local lab environment set up (generates the .env files for your SPA app and API in the Codespace).

[xijing-zhang]

LGTM - tested through end of CodeTour part 1: Create the Single Page Application in your Auth0 Tenant