I erased in my folder .pub-cache/hosted/pub.dartlang.org/this_plugin
What is the command to update the dependencies inside pubsec.yaml
flutter pub cache repair
or delete /Users/xxxxxxx/development/tools/flutter/.pub-cache/hosted/pub.dartlang.org/cloud_firestore-0.8.2+3/ and run flutter packages get again.
if all the above things fail delete the cache folder or also check the version updated in the lock file (some time lock give me the problem with updating the version number)
Disclaimer: By running the command above, have a really fast internet connection or be ready to lose one hour of productive hours. ( it will redownload every package every installed on your pc, and I mean each and all of the versions of each packages)~TSR
PS: Why flutter pub cache repair download every package version previously used?