v7.7.0
- Add d3.unixDay and d3.unixDays. https://github.com/d3/d3-time/pull/58
- Adopt d3.unixDay in place of d3.utcDay for d3.utcTicks to ensure uniform tick spacing.
- Fix mutation of user-owned thresholds in d3.bin. https://github.com/d3/d3-array/issues/263
- Fix infinite loop when d3.quantile or d3.quickselect is called with invalid arguments. https://github.com/d3/d3-array/pull/262