isUnstable - nodef/extra-version GitHub Wiki
Checks if version is major 0, or pre-release. :running: :vhs: :package: :moon: :ledger:
version.isUnstable(x);
// x: a version
const version = require('extra-version');
var x = version.from('1.2');
version.isUnstable(x);
// false
var x = version.from('0.2');
version.isUnstable(x);
// true
var x = version.from('1.2-alpha');
version.isUnstable(x);
// true