Update changelog

CHANGELOG.md

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 # Fornjot - Changelog
 
+## v0.19.0 (2022-10-10)
+
+### End-user improvements
+
+Improvements to Fornjot and its documentation that are visible to end users.
+
+*None this week. Still busy improving the kernel!*
+
+### Ecosystem improvements
+
+Improvements to Fornjot components that are relevant to developers building on top of those. These have an indirect effect on end users, through fixed bugs and improved robustness.
+
+#### `fj-kernel`
+
+- Make minor cleanups in sweep code ([#1167])
+- Fix various instances of duplicate objects being created ([#1168], [#1170], [#1172], [#1174])
+- Expand and improve partial object API ([#1169], [#1171])
+- Improve `Debug` implementation of `ObjectId` ([#1173])
+- Simplify `HalfEdge` and `Vertex` ([#1175], [#1178])
+- Expand scope of centralized object storage ([#1176], [#1179], [#1180])
+- Clean up handling of vertices in normalized order ([#1181])
+
+### Internal Improvements
+
+Improvements that are relevant to developers working on Fornjot itself.
+
+- Update release procedure ([#1165], [#1177])
+- Update dependencies ([#1166], [#1182], [#1183], [#1184], [#1185], [#1186], [#1187], [#1188], [#1189], [#1192])
+
+[#1165]: https://github.com/hannobraun/Fornjot/pull/1165
+[#1166]: https://github.com/hannobraun/Fornjot/pull/1166
+[#1167]: https://github.com/hannobraun/Fornjot/pull/1167
+[#1168]: https://github.com/hannobraun/Fornjot/pull/1168
+[#1169]: https://github.com/hannobraun/Fornjot/pull/1169
+[#1170]: https://github.com/hannobraun/Fornjot/pull/1170
+[#1171]: https://github.com/hannobraun/Fornjot/pull/1171
+[#1172]: https://github.com/hannobraun/Fornjot/pull/1172
+[#1173]: https://github.com/hannobraun/Fornjot/pull/1173
+[#1174]: https://github.com/hannobraun/Fornjot/pull/1174
+[#1175]: https://github.com/hannobraun/Fornjot/pull/1175
+[#1176]: https://github.com/hannobraun/Fornjot/pull/1176
+[#1177]: https://github.com/hannobraun/Fornjot/pull/1177
+[#1178]: https://github.com/hannobraun/Fornjot/pull/1178
+[#1179]: https://github.com/hannobraun/Fornjot/pull/1179
+[#1180]: https://github.com/hannobraun/Fornjot/pull/1180
+[#1181]: https://github.com/hannobraun/Fornjot/pull/1181
+[#1182]: https://github.com/hannobraun/Fornjot/pull/1182
+[#1183]: https://github.com/hannobraun/Fornjot/pull/1183
+[#1184]: https://github.com/hannobraun/Fornjot/pull/1184
+[#1185]: https://github.com/hannobraun/Fornjot/pull/1185
+[#1186]: https://github.com/hannobraun/Fornjot/pull/1186
+[#1187]: https://github.com/hannobraun/Fornjot/pull/1187
+[#1188]: https://github.com/hannobraun/Fornjot/pull/1188
+[#1189]: https://github.com/hannobraun/Fornjot/pull/1189
+[#1192]: https://github.com/hannobraun/Fornjot/pull/1192
+
+
 ## v0.18.0 (2022-10-04)
 
 ### End-user improvements