Fix fuzz (#199)

Fix fuzzer (LoadString does not exist), and mention it in the README.

README.md

@@ -114,6 +114,11 @@ You have to make sure two kind of tests run:
 
 You can run both of them using `./test.sh`.
 
+### Fuzzing
+
+The script `./fuzz.sh` is available to
+run [go-fuzz](https://github.com/dvyukov/go-fuzz) on go-toml.
+
 ## Versioning
 
 Go-toml follows [Semantic Versioning](http://semver.org/). The supported version

fuzz.go

@@ -19,7 +19,7 @@ func Fuzz(data []byte) int {
 		panic(err)
 	}
 
-	tree, err = LoadString(str)
+	tree, err = Load(str)
 	if err != nil {
 		if tree != nil {
 			panic("tree must be nil if there is an error")