build(deps): bump email_validator

Bumps [email_validator](https://github.com/fredeil/email-validator.dart) from 2.1.17 to 3.0.0.
- [Release notes](https://github.com/fredeil/email-validator.dart/releases)
- [Changelog](https://github.com/fredeil/email-validator.dart/blob/master/CHANGELOG.md)
- [Commits](fredeil/email-validator.dart@v2.1.17...v3.0.0)

---
updated-dependencies:
- dependency-name: email_validator
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

modules/serverpod_auth/serverpod_auth_email_flutter/pubspec.yaml

@@ -13,7 +13,7 @@ environment:
 dependencies:
   flutter:
     sdk: flutter
-  email_validator: ^2.1.17
+  email_validator: ">=2.1.17 <4.0.0"
   serverpod_auth_client: 2.0.2
   serverpod_auth_shared_flutter: 2.0.2