upgrade path provider version

Author: lohanidamodar

templates/flutter/pubspec.yaml.twig

@@ -16,7 +16,7 @@ dependencies:
   flutter_web_auth_2: ^2.0.2
   http: ^0.13.5
   package_info_plus: ^3.0.2
-  path_provider: ^2.0.11
+  path_provider: ^2.0.12
   web_socket_channel: ^2.2.0
   universal_html: ^2.0.8