chore: import upstream snapshot with attribution

luaplugin/testmain_test.go

@@ -0,0 +1,12 @@
+package luaplugin
+
+import (
+	"os"
+	"testing"
+)
+
+func TestMain(m *testing.M) {
+	os.Unsetenv("CLIAMP_CONFIG_DIR")
+	os.Unsetenv("XDG_CONFIG_HOME")
+	os.Exit(m.Run())
+}