"null" in timezoneJS.timezone.getAllZones() results

[mlowicki]

This is how I initialize lib:

timezoneJS.timezone.zoneFileBasePath = "tzdata";
timezoneJS.timezone.defaultZoneFile = ["africa", "antarctica", "asia", "australasia", "europe", "northamerica", "southamerica"];

timezoneJS.timezone.init();

And now when I run:

timezoneJS.timezone.getAllZones() last position in the returned array is "null" string.

[longlho]

async w/ callback for multiple zone files is not supported yet.