Show stack trace with Eleventy config errors

[zellwk]

I got this error message while configuring Eleventy:

Eleventy fatal error: (full stack in DEBUG output)
> Error in your Eleventy config file '/Users/zellwk/Projects/private-repos/zellwk/eleventy.js'. (EleventyConfigError)
> Unexpected token < (SyntaxError)

But I couldn't find the error when I ran Eleventy in DEBUG mode. Searched the logs and couldn't find an instance of Unexpected token < (SyntaxError)

Maybe showing the stack trace when the error happens would help improve dev experience?

[zachleat]

Current status:

Note for me: still needs love when the syntaxerror happens during --watch

[zellwk]

This is already so useful!