Replace buster-format with formatio in node

This is a follow up of commit 12421240 which missed a buter-format
reference.
Quick "fix": disable unstable tests in node

Add a command line argument to reenable. This is a "Quick Fix" based on
commit 6d4de31 which did the same thing but for browser tests only.
Merge pull request #388 from sukima/feature/fix-broken-test-package

Fix failing tests on Travis-CI