Update NEWS.md

Author: schloerke

NEWS.md

@@ -1,8 +1,17 @@
 # plumber 1.3.1
 
-* Added support for [Arrow IPC Streams](https://arrow.apache.org/docs/format/Columnar.html#serialization-and-interprocess-communication-ipc) (@josiahparry #968)
-* Fixed a bug where setting the `apiPath` option wouldn't be honored when running the app (@thomasp85, #836)
-* Removed deprecated `mockery` package dependency. Tests now use native R closures for callback tracking. (#1009)
+## New features
+
+* `serializer_feather_stream()` and `parser_feather_stream()` now support
+  [Arrow IPC Streams](https://arrow.apache.org/docs/format/Columnar.html#serialization-and-interprocess-communication-ipc)
+  (@josiahparry, #968).
+
+## Bug fixes and minor improvements
+
+* `pr_run()` now correctly honors the `apiPath` option when mounting
+  documentation (@thomasp85, #836).
+
+* Added CI testing for only depends packages by request of CRAN (#1006).
 
 # plumber 1.3.0