Closure Library v20200315

New Additions

• Add SafeHtml.comment.

Security Fixes

• Fixes CVE-2020-8910.

Backwards Incompatible Changes

• Delete inlay css styles, which are not actually used by Closure.
• Add non-nullable modifier to return type of functions never returning null.
• Remove forwardDeclares from Closure Events Listenable by reducing the typing of the event key's src property to just Listenable, instead of Listenable|EventTarget. Note that EventTarget is the primary implementation of Listenable.

Other Changes

• Added SafeUrl.fromMediaSource()
• Fix authority parsing in Closure URI parser.
• Document mode is now based on user agent on IE if not present in document
• Add a define to module manager so that we can control module loading behaviors.
• Add non-nullable modifier to return type of functions never returning null.
• goog.isArray in deprecated in favor of Array.isArray
• Update Thenable.then rejection handler JSDoc to reflect actual functionality.