Update pubspec.yaml

Author: jerson

pubspec.yaml

@@ -1,6 +1,6 @@
 name: openpgp
 description: library for use OpenPGP with support for android and ios, macOS, linux, windows and web
-version: 3.7.2
+version: 3.7.3
 homepage: https://github.com/jerson/flutter-openpgp
 
 environment:
@@ -39,4 +39,4 @@ flutter:
       macos:
         pluginClass: OpenpgpPlugin
       windows:
-        pluginClass: OpenpgpPlugin
+        pluginClass: OpenpgpPlugin