NEWS: mention ncdirect image render split

.drone.yml

@@ -66,10 +66,9 @@ name: ubuntu-focal
 
 steps:
 - name: ubuntu-build
-  image: dankamongmen/hirsute:2020-12-21a
+  image: dankamongmen/hirsute:2020-12-21b
   commands:
     - export LANG=en_US.UTF-8
-    - apt-get -y install cmake
     - mkdir build
     - cd build
     - cmake -DCMAKE_BUILD_TYPE=Debug -DUSE_MULTIMEDIA=none ..

NEWS.md

@@ -3,6 +3,9 @@ rearrangements of Notcurses.
 
 * 2.1.2 (not yet released)
   * Add `notcurses_linesigs_enable()` and `notcurses_linesigs_disable()`.
+  * Divide `ncdirect_render_image()` into component `ncdirect_render_frame()`
+    and `ncdirect_raster_frame()` (the original remains), allowing multiple
+    threads to decode images concurrently.
 
 * 2.1.1 (2020-12-16)
   * Progress bars via `ncprogbar`, using the standard widget API.