[file_selector] Endorse the web implementation

[tugorez]

This PR endorses file_selector_web as file_selector's web implementation.

Pre-launch Checklist

• The title of the PR starts with the name of the plugin surrounded by square brackets, e.g. [shared_preferences]
• I read the Contributor Guide and followed the process outlined there for submitting PRs.
• I read the Tree Hygiene wiki page, which explains my responsibilities.
• I read and followed the Flutter Style Guide and the C++, Objective-C, Java style guides.
• I listed at least one issue that this PR fixes in the description above.
• I added new tests to check the change I am making or feature I am adding, or Hixie said the PR is test exempt.
• I updated pubspec.yaml with an appropriate new version according to the pub versioning philosophy.
• I updated CHANGELOG.md to add a description of the change.
• I updated/added relevant documentation (doc comments with ///).
• I signed the CLA.
• All existing and new tests are passing.

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[tugorez]

cc @ditman

[ditman]

Before this gets merged, can you please update https://github.com/flutter/plugins/tree/master/packages/file_selector/file_selector_platform_interface so it depends in the latest version of cross_file?

[tugorez]

Before this gets merged, can you please update https://github.com/flutter/plugins/tree/master/packages/file_selector/file_selector_platform_interface so it depends in the latest version of cross_file?

Sure, already sent #3422. After it is merged and released I'll make the ammendments and change this PR's status to ready for review. Thanks @ditman :)

[ditman]

I've just merged #3422, now waiting for CI to publish it.

[ditman]

The failing tests here were my fault, I never published 1.0.3 of the platform_interface. I've now published 1.0.3+1 and restarted the tests here. Everything should pass now.

[google-cla]

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[ditman]

@googlebot I consent.

[ditman]

This will need to be rebased again, it's missing a CI fix from master! Sorry for the inconvenience!

[tugorez]

This PR is ready to go @ditman :)!

[tugorez]

This was already endorsed https://github.com/flutter/plugins/blob/master/packages/file_selector/file_selector/pubspec.yaml. Marking this as closed