Version raised to 0.1.9

pubspec.yaml

 name: minio
 description: Unofficial MinIO Dart Client SDK that provides simple APIs to access any Amazon S3 compatible object storage server.
-version: 0.1.8
+version: 0.1.9
 homepage: https://github.com/xtyxtyx/minio-dart
 issue_tracker: https://github.com/xtyxtyx/minio-dart/issues
 
@@ -12,7 +12,7 @@ dependencies:
   http: ^0.12.2
   crypto: ^2.1.5
   convert: ^2.1.1
-  xml: ^4.2.0
+  xml: ^4.5.1
   buffer: ^1.0.7
   intl: ^0.16.1
   mime: ^0.9.7