Bump intl from 0.17.0 to 0.18.0

Bumps [intl](https://github.com/dart-lang/intl) from 0.17.0 to 0.18.0.
- [Release notes](https://github.com/dart-lang/intl/releases)
- [Changelog](https://github.com/dart-lang/intl/blob/master/CHANGELOG.md)
- [Commits](https://github.com/dart-lang/intl/commits)

---
updated-dependencies:
- dependency-name: intl
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

pubspec.yaml

@@ -27,7 +27,7 @@ dependencies:
   qr_flutter: ^4.0.0
   # qr_code_scanner: ^0.7.0
   http: ^0.13.4
-  intl: ^0.17.0
+  intl: ^0.18.0
   json_annotation: ^4.4.0
   meta: ^1.7.0
   mobile_scanner: 2.0.0