Release 0.40.0 is out

[migueldeicaza]

• Makes @export work with GArray and Variant types, fixes Improve @Export to support Variant and GArray types. #410 by Miguel

• API typo fix for degreesToRadians, spotted by @jbromberg

• Fixes Exported VariantCollection and ObjectCollection types do not
  appear in the Editor (Exported VariantCollection and ObjectCollection types do not appear in the Editor #408) by Estevan Hernandez.

• Enumerations now conform to CustomDebugStringConvertible to assist
  in your debugging and GodotError exposes localizedDescription by Miguel)

• Fixes running tests with swift test when using --verbose mode
  (Issue Add object cleaning after each test #407) by Mikhail Tishin

• Fixes Unable to use await for Timer.timeout signal (Unable to use await for Timer.timeout signal #403) by Mikhail Tishin.