3.0.0

This update contains breaking changes:

The plugin now uses namespaces rather than prefixed class or function names. Any references in custom code to classes or functions in this plugin will need to be updated.

For example to get the plugin class instance change S3_Uploads::get_instance() to S3_Uploads\Plugin::get_instance().

• Switch to using PHP namespaces #401 by @joehoyle
• Save filesize with attachment metadata on upload #493 by @goldenapples
• Switch to fixed version of Psalm Plugin WordPress #494 by @joehoyle
• Forward travis env vars to Psalm #480 by @joehoyle
• Publish type coverage to Psalm Shepherd #479 by @joehoyle
• Lazy load s3 client #475 by @joehoyle
• Set coding-standards to 0.8.0 #477 by @joehoyle
• Loosen type signature add_s3_signed_params_to_attachment_image_src #474 by @joehoyle
• Fix issue with get attachment image src #447 by @stuartshields