v0.2.1 remove testify dep

README.md

@@ -2,8 +2,7 @@
 
 Thread-safe configuration from TOML files, environment variables, command-line
 arguments and registered defaults. Requires Go 1.27.1. The only runtime dependency
-is [lixenwraith/toml](https://github.com/lixenwraith/toml), pinned to merged commit
-`b59d068ff6a4`. Testify and its dependencies are used only by tests.
+is [lixenwraith/toml](https://github.com/lixenwraith/toml).
 
 ```go
 package main