Changelog entry

Author: Øyvind Lind-Johansen

CHANGELOG.md

@@ -7,6 +7,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [UNRELEASED] - YYYY-MM-DD
 
+### Added
+- [#1217](https://github.com/equinor/webviz-subsurface/pull/1207) - New plugin `SimulationTimeSeriesOneByOne`, meant to replace the old `ReservoirSimulationTimeSeriesOneByOne`. Uses the `.arrow` summary provider and is implemented with WLF (Webviz Layout Framework).
+
+
+## [0.2.19] - YYYY-MM-DD
+
 ### Changed
 
 - [#1211](https://github.com/equinor/webviz-subsurface/pull/1211) - `RftPlotter`: Parameter response view always displayed, also for sensitivity ensembles. Instead it is now possible to filter on SENSNAME.