v2.1.0

[2.1.0] - 2019-03-21

Changed

• LitElement.renderRoot is now public readonly instead of protected.

Fixed

• Exceptions generated during update/render do not block subsequent updates (#262).
• Initial update is scheduled at construction time rather than connected time (#594).
• A reflecting property set immediately after a corresponding attribute
  now reflects properly (#592).
• Properties annotated with the @query and @queryAll decorators will now
  survive property renaming optimizations when used with tsickle and Closure JS
  Compiler.