How to release amp toolbox package

To release a new version of the amp-toolbox package, we need to publish a new release in GitHub. To do that, follow these steps:

• Review the changes from the last release and the merged pull requests in the current milestone.

• Ensure that there are no open issues in the current milestone.

• Go to https://github.com/ampproject/amp-toolbox-php/releases and click the "Draft a new release" button.

• From the "Choose a tag" dropdown, enter the current milestone version number to create a new release tag.

• Click the "Generate release notes" button to automatically generate the release notes.

• It will generate notes like this.

• Format the "What's Changed" section according to the structure used in the version 0.2.0 release.

• Click the "Publish release" button.

• After that, the package will automatically publish in packagist.org. Verify that the latest version is listed at https://packagist.org/packages/ampproject/amp-toolbox.