[core] Update changelog

mapbox · Feb 13, 2020 · 3c802fb · 3c802fb
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 - [core] Add support for using `within expression` with layout propery. ([#16194](https://github.com/mapbox/mapbox-gl-native/pull/16194))
 
+### 🐞 Bug fixes
+
+- Store gfx::DrawScope objects with associated render objects. ([#15395](https://github.com/mapbox/mapbox-gl-native/pull/15395))
+
+  We used some shared SegmentVectors, e.g. for drawing raster or background tiles. In longer running maps, this lead to resource accumulation. By storing the SegmentVectors and the contained gfx::DrawScope objects, we ensure that resources get released when the associated render objects vanish.
+
 ### 🏁 Performance improvements
 
  - [core] Loading images to style optimization ([#16187](https://github.com/mapbox/mapbox-gl-native/pull/16187))