gps data issue

[upscmapping]

the dart version needs to be updated

[Xentraxx]

TheLastGimbus is not super active here, so I encourage you to try the newest prerelease in my fork:
https://github.com/Xentraxx/GooglePhotosTakeoutHelper

But please note that it is a complete rewrite with a lot of added functionality and changes, so please read the ReadMe.