Cannot read properties of undefined (reading 'example') at generateIntrospectionReturnTypeExample

[mbugni]

Hello,
I'm facing this issue when I try to generate docs from a schema with custom scalars:

PS ~> npx spectaql spectaql-config.yml
TypeError: Cannot read properties of undefined (reading 'example')
    at generateIntrospectionReturnTypeExample (C:\Users\myuser\AppData\Roaming\npm\node_modules\spectaql\dist\lib\common.js:374:28)

I simply fixed it by changing the common.js at line 374 from:

function generateIntrospectionReturnTypeExample(
{ thing, underlyingTypeDefinition, originalType, quoteEnum = false },
otherOptions)
{
  let example = (0, _utils.firstNonUndef)([
  thing.example,
  originalType.example,
  underlyingTypeDefinition.example]
  );

to:

function generateIntrospectionReturnTypeExample(
{ thing, underlyingTypeDefinition, originalType, quoteEnum = false },
otherOptions)
{
let example = (0, _utils.firstNonUndef)([
thing.example,
originalType.example,
(underlyingTypeDefinition ? underlyingTypeDefinition.example : null)]
);