0.3-beta1

This pre-release includes 27 closed issues and merged pull requests. For a full list intended for this release, see the 0.3 milestone. Compare all changes in 0.2.0...0.3-beta1. A summary of the changes in this release:

• Eliminate need for disabling navigation preload while adding navigation request caching strategy. #178
• Guard against causing Workbox to call importScripts() after SW installation, as this can cause a JS error. #194
• Differentiate between client and server being offline in the messaging on the offline page. #177, #190
• Only use enqueued scripts/style handles in revision to prevent endless reload if skip waiting enabled. #183 #187
• Prevent needless wordpress_sw_installed cookie from being set outside the wp-admin. #188, #189
• Skip installation of service worker from post embed iframe. #182
• Eliminate auto-derived short_name from manifest since not reliable. #181, #200, #201
• Use name instead of short_name for meta tags when latter is not available. #168, #169.
• Prevent optimizer plugins from erroneously stripping HTML comments from JS. #155, #165.
• Update Workbox.js to 4.3.1. #154
• Clean up code: remove unused basename calculation; avoid PHP-4 style intval() function, use cast instead; remove redundant CSS rule… #164, #162, #157, #159, #156, #161, #158, #163.
• Bump minimum required WordPress version to 5.2. #151
• Update npm and composer packages. #195

Props Alain Schlesser (@schlessera), Ian Dunn (@iandunn), Pascal Birchler (@swissspidy), and Weston Ruter (@westonruter).