v0.2.0 toml-only, harden concurrency and env export, dep updates

go.mod

@@ -1,15 +1,14 @@
 module github.com/lixenwraith/config
 
-go 1.26.0
+go 1.27.1
 
 require (
-	github.com/BurntSushi/toml v1.6.0
-	github.com/go-viper/mapstructure/v2 v2.5.0
+	github.com/lixenwraith/toml v0.0.0-20260928180512-b59d068ff6a4
 	github.com/stretchr/testify v1.10.0
-	gopkg.in/yaml.v3 v3.0.1
 )
 
 require (
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 )