add v8.4 and v9.1 releases

_posts/2024-03-25-release_v8.4.0.md

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+---
+layout: post
+title: v8.4.0 is released
+author: "kisvegabor"
+cover: /assets/release_cover.webp
+---
+
+## [v8.4.0](https://github.com/lvgl/lvgl/compare/v8.3.11...v8.4.0) 19 March 2024
+
+### New Features
+
+- feat(pxp): add zephyr support [5838](https://github.com/lvgl/lvgl/pull/5838)
+- feat(calendar): set a custom year list for calendar header [5275](https://github.com/lvgl/lvgl/pull/5275)
+- feat(build): add pkgconfig file (#4744) [5067](https://github.com/lvgl/lvgl/pull/5067)
+
+### Fixes
+
+- fix(canvas): lv_canvas_transform negative offset_y parameter [5846](https://github.com/lvgl/lvgl/pull/5846)
+- fix(st-dma2d): remove unused functions [5561](https://github.com/lvgl/lvgl/pull/5561)
+- fix(gpu-arm2d): fix a blending issue in blend-normal-with-mask-and-opa [5163](https://github.com/lvgl/lvgl/pull/5163)
+- fix(screen): fix crash when starting two screen loads with animations [5062](https://github.com/lvgl/lvgl/pull/5062)
+- fix(chart): fix memory leak in lv_chart_remove_series [5001](https://github.com/lvgl/lvgl/pull/5001)
+- fix(snapshot): set data_size on returned dsc [4972](https://github.com/lvgl/lvgl/pull/4972)
+- docs(meter): change LV_PART_TICK -> LV_PART_TICKS [e277114](https://github.com/lvgl/lvgl/commit/e277114631da2caf6cebcf020ab19fdce6c068c0)
+
+### Docs
+
+- docs: fixed some typos [5502](https://github.com/lvgl/lvgl/pull/5502)
+- docs(sjpg): color depth no longer limited to 16 bits [4971](https://github.com/lvgl/lvgl/pull/4971)
+- docs: add banner [b7a20df](https://github.com/lvgl/lvgl/commit/b7a20df38f76958f3613f9ccf4b82cfab33f72e0)
+- docs(meter): change LV_PART_TICK -> LV_PART_TICKS [e277114](https://github.com/lvgl/lvgl/commit/e277114631da2caf6cebcf020ab19fdce6c068c0)
+
+### Others
+
+- chore(group):avoid null pointer access [5864](https://github.com/lvgl/lvgl/pull/5864)
+- doc(font): update Bidirectional support [5416](https://github.com/lvgl/lvgl/pull/5416)
+- chore: code formatting [8588762](https://github.com/lvgl/lvgl/commit/8588762572804e068d001c0d208d49250862c76e)