docs/CHANGELOG.md: cut v1.56.0

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Aliaksandr Valialkin 2021-03-17 02:04:55 +02:00
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# tip # tip
# [v1.56.0](https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.56.0)
* FEATURE: add the following functions to [MetricsQL](https://victoriametrics.github.io/MetricsQL.html): * FEATURE: add the following functions to [MetricsQL](https://victoriametrics.github.io/MetricsQL.html):
- `histogram_avg(buckets)` - returns the average value for the given buckets. - `histogram_avg(buckets)` - returns the average value for the given buckets.
- `histogram_stdvar(buckets)` - returns standard variance for the given buckets. - `histogram_stdvar(buckets)` - returns standard variance for the given buckets.