Using object getter function will fail debugger

[eabadjiev]

When using a getter function the GAS Editor debugging will fail with We're sorry, a server error occurred. The script will run as expected.

Steps to reproduce:

1. Clone the app-script-starter repo

2. Add a class with getter function

   
   class Fail {
   constructor() {
   this.log = ['a', 'b', 'c'];
   }
   
   get latest() {
   return this.log[this.log.length - 1];
   }
   }

global.failDebugger = () => { const f = new Fail(); Logger.log(Fail: ${f.latest}); };

3. Debug `failDebugger` from GAS Editor

Expected result: 
- be able to debug

Actual result:
- debugger fails w/ `We're sorry, a server error occurred`

Few notes:
- actually it is not needed the functionality `Fail` to be used for the debugger to fail
- the starter we where using was inspired (creative copy/paste) from Atlassian [Gmail Addon](https://medium.com/@jsarafajr/google-apps-script-without-pain-or-success-story-of-atlassian-cloud-for-gmail-6cd99ba40de0)

[labnol]

The Apps Script Starter Kit now uses the v8 Runtime that should resolve the issue.