Bump dart_either from 1.0.0-beta01 to 1.0.0-beta02

Bumps [dart_either](https://github.com/hoc081098/dart_either) from 1.0.0-beta01 to 1.0.0-beta02.
- [Release notes](https://github.com/hoc081098/dart_either/releases)
- [Commits](hoc081098/dart_either@1.0.0-beta01...1.0.0-beta02)

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

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

pubspec.lock

@@ -175,7 +175,7 @@ packages:
       name: dart_either
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.0-beta01"
+    version: "1.0.0-beta02"
   dart_style:
     dependency: transitive
     description: