Prepare for new Release 6.51.0+147 (#1924)

Co-authored-by: sensuikan1973 <[email protected]>

pubspec.yaml

@@ -21,7 +21,7 @@ issue_tracker: https://github.com/sensuikan1973/pedax/issues
 #
 # NOTE: you can't specify duplicated build number.
 # See: https://appstoreconnect.apple.com/apps/1557500142/buildactivity
-version: 6.50.0+146
+version: 6.51.0+147
 
 environment: # See: https://dart.dev/tools/pub/pubspec#sdk-constraints
   sdk: ">=3.3.0 <4.0.0"