cross spawn update

[rbaconcordium]

Purpose

cross spawn updated to a newer version to avoid audit alerting vulnerability

Changes

ran yarn up cross-spawn -R which upgraded the version
confirmed no more alert by running yarn npm audit

Checklist

• [ x ] My code follows the style of this project.
• [ x ] The code compiles without warnings.
• [ x ] I have performed a self-review of the changes.
• [ x ] I have documented my code, in particular the intent of the
  hard-to-understand areas.
• (If necessary) I have updated the CHANGELOG.