Add topics to package intl pubspec.yaml

[szakarias]

Topics help users on pub.dev discover packages and related packages.

You can see a list of topics here.
You can also make your own topics.

Topics are added to pubspec.yaml as follows:

 - my-topic
 - some-other-topic

See also: https://dart.dev/tools/pub/pubspec#topics

[github-actions]

Package publishing

Package	Version	Status	Publish tag (post-merge)
package:intl4x	0.9.0	ready to publish	intl4x-v0.9.0
package:intl	0.20.0-wip	WIP (no publish necessary)
package:intl_translation	0.20.1-wip	WIP (no publish necessary)
package:messages	0.2.0	already published at pub.dev
package:messages_builder	0.2.1	already published at pub.dev
package:messages_serializer	0.2.1	already published at pub.dev
package:messages_shrinker	0.2.2-wip	WIP (no publish necessary)

Documentation at https://github.com/dart-lang/ecosystem/wiki/Publishing-automation.

[github-actions]

PR Health

Breaking changes ✔️

Details

Package	Change	Current Version	New Version	Needed Version	Looking good?
intl	None	0.20.0-wip	0.20.0-wip	0.20.0-wip	✔️

Changelog Entry ✔️

Details

Package	Changed Files

Changes to files need to be accounted for in their respective changelogs.

Coverage ✔️

Details

File	Coverage

This check for test coverage is informational (issues shown here will not fail the PR).

API leaks ⚠️

Details

The following packages contain symbols visible in the public API, but not exported by the library. Export these symbols or remove them from your publicly visible API.

Package	Leaked API symbols
intl	_DateFormatField StringStack DateBuilder

This check can be disabled by tagging the PR with skip-leaking-check.

License Headers ✔️

Details

// Copyright (c) 2024, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

Files
no missing headers

All source files should start with a license header.

Package publish validation ✔️

Details

Package	Version	Status
package:intl4x	0.9.0	ready to publish
package:intl	0.20.0-wip	WIP (no publish necessary)
package:intl_translation	0.20.1-wip	WIP (no publish necessary)
package:messages	0.2.0	already published at pub.dev
package:messages_builder	0.2.1	already published at pub.dev
package:messages_serializer	0.2.1	already published at pub.dev
package:messages_shrinker	0.2.2-wip	WIP (no publish necessary)

Documentation at https://github.com/dart-lang/ecosystem/wiki/Publishing-automation.

[szakarias]

@mosuem Do you know whether this changed should be applied in Google3 first?

[mosuem]

Yes, PRs here are merged automatically by copybara after being approved in g3.

[kevmoo]

Maybe add internationalization too? Or what's common on pub?