Running `npm run test` locally results in an error

[arch0345]

Describe the bug
Running npm run test locally results in an error. This used to work before the release of v5

To Reproduce
Steps to reproduce the behavior:

1. Run npm install
2. Run npm run test

Expected behavior

Prints out schema okay or an error related to code you've added.

Screenshots

This is the error I'm getting.

[tyrasd]

🤔 I cannot reproduce this error as this works fine for me. Also for a freshly checked out version of the repository. I assume you have no local changes made to the repo? Would you mind sharing which versions of node, npm and operating system you are running?

[tyrasd]

Wait, I do see this when running npm test on windows. Might be related to ideditor/schema-builder#55