upgrade version from [2.17.1] to [2.18.4] for incompatible versions

[itsmelaxman]

Upgrader package is incompatible with my version...so, I Just upgrade the version to 2.18.4 from 2.17.1

[codecov[bot]]

Codecov Report

Base: 93.07% // Head: 93.07% // No change to project coverage :thumbsup:

Coverage data is based on head (ea3d383) compared to base (1238f62). Patch has no changes to coverable lines.

:exclamation: Current head ea3d383 differs from pull request most recent head 6cf16de. Consider uploading reports for the commit 6cf16de to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #245 +/- ## ======================================= Coverage 93.07% 93.07% ======================================= Files 10 10 Lines 967 967 ======================================= Hits 900 900 Misses 67 67 ``` Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Larry+Aasen). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Larry+Aasen)

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[larryaasen]

@itsmelaxman What was not compatible with upgrader?

[itsmelaxman]

@itsmelaxman What was not compatible with upgrader?

I was not able to place the upgrader package in my pubspec.yaml due to package low sdk version. so, I just change the sdk version of root folder from [2.17.1] to [2.18.4] and push here.

[larryaasen]

That will eliminate many users from utilizing a new version of upgrader who have not yet upgraded their Dart SDK to 2.18.4. How do you plan to continue to support those users?

[larryaasen]

I updated the upgrader package to version 6.0.0 to support Flutter 3.3.10 and Dart 2.18.6 today. Check it out.