Moderate severity vulnerability

[krizzdev]

I got recent npm vulnerabilities which require some attention:

I'm using version 0.2.1
And my npm audit outputs:
Moderate: Regular Expression Denial of Service
Package acorn
js-query-builder [dev]
js-query-builder > jest > jest-cli > @jest/core > jest-config > jest-environment-jsdom > jsdom > acorn
More Info : https://npmjs.com/advisories/1488

There is also the pull request #2 which moves jest to the dev dependencies