build(deps): bump watcher from 1.2.0 to 1.2.1 (#187)

Bumps [watcher](https://github.com/dart-lang/tools/tree/main/pkgs) from 1.2.0 to 1.2.1.
- [Release notes](https://github.com/dart-lang/tools/releases)
- [Commits](https://github.com/dart-lang/tools/commits/watcher-v1.2.1/pkgs)

---
updated-dependencies:
- dependency-name: watcher
  dependency-version: 1.2.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

pubspec.yaml

@@ -65,7 +65,7 @@ dependencies:
   shelf: ^1.4.2
   qr_flutter: ^4.1.0
   desktop_multi_window: ^0.3.0
-  watcher: ^1.2.0
+  watcher: ^1.2.1
   path: ^1.9.1
   crypto: ^3.0.7
   xml: ^6.6.1