Prepare release.

Author: n3vu0r

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "ndarray-slice"
-version = "0.2.2"
+version = "0.2.3"
 rust-version = "1.60"
 edition = "2021"
 authors = ["Rouven Spreckels <rs@qu1x.dev>"]

RELEASES.md

@@ -1,3 +1,9 @@
+# Version 0.2.3 (2023-05-28)
+
+  * Lower worst-case time complexity from **O**(**n** log **n**) to **O**(**n**)
+    for selection algorithms.
+  * Improve overall sorting performance.
+
 # Version 0.2.2 (2023-04-13)
 
   * Add `rayon` feature for parallel sorting and parallel bulk-selection.