[flatpak] improvement: logging what was requested to upgrade

bauh/gems/flatpak/model.py

@@ -149,3 +149,10 @@ class FlatpakApplication(SoftwarePackage):
     def update_ref(self):
         if self.id and self.arch and self.branch:
             self.ref = f'{self.id}/{self.arch}/{self.branch}'
+
+    def __repr__(self) -> str:
+        return f'Flatpak (id={self.id}, branch={self.branch}, origin={self.origin}, installation={self.installation},' \
+               f' partial={self.partial}, update_component={self.update_component})'
+
+    def __str__(self):
+        return self.__repr__()