Merge pull request #44 from digama0/patch-2

fix usage example

Author: zbraniecki

README.md

@@ -59,7 +59,7 @@ fn main() {
                 SourceAnnotation {
                     label: "",
                     annotation_type: AnnotationType::Error,
-                    range: (205, 207),
+                    range: (187, 189),
                 },
                 SourceAnnotation {
                     label: "while parsing this struct",