Use deserializer.visit_string for PathBuf

serde/src/de/impls.rs

@@ -762,7 +762,7 @@ impl Deserialize for path::PathBuf {
     fn deserialize<D>(deserializer: &mut D) -> Result<path::PathBuf, D::Error>
         where D: Deserializer,
     {
-        deserializer.visit(PathBufVisitor)
+        deserializer.visit_string(PathBufVisitor)
     }
 }