chore: release v0.2.6

Author: github-actions[bot]

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "non-empty-string"
-version = "0.2.5"
+version = "0.2.6"
 edition = "2021"
 authors = ["Midas Lambrichts <[email protected]>"]
 license = "MIT OR Apache-2.0"