1.3.0

• Add use_trailing option to show rolling history instead of calendar periods.
• Add trailing_periods option to customize the number of periods shown.
• Set default trailing periods: hour=24, day=7, week=4, month=12.
• Fix tooltip to show single date for daily bins instead of confusing ranges.
• Fix tooltip to show month name for monthly bins.
• Fix editor crash when _config is undefined.