fast-json-stringify is not a validator (#558)

* fast-json-stringify is not a validator

* fixup

Signed-off-by: Matteo Collina <[email protected]>

Signed-off-by: Matteo Collina <[email protected]>

Author: mcollina

README.md

@@ -656,6 +656,10 @@ While the `schema` is currently validated for any developer errors,
 there is no guarantee that supplying user-generated schema could not
 expose your application to remote attacks.
 
+Users are responsibile for sending trusted data. `fast-json-stringify` guarantees that you will get
+a valid output only if your input matches the schema or can be coerced to the schema. If your input
+doesn't match the schema, you will get undefined behavior. 
+
 <a name="debug"></a>
 ### Debug Mode