[gnome-calculator/wip/currency-conversion-plugins] (19 commits) ...Use async provider downloads by default

[Robert Roth <robertroth src gnome org>]

Summary of changes:

  adc1827... Use HdyWindow and HdyHeaderBar (*)
  ac088de... CI: Add libhandy as a dependency for Fedora & Ubuntu builds (*)
  1a450cb... Change "Clr" to "C" (*)
  9eeeb38... Merge branch 'scootergrisen/gnome-calculator-scootergrisen- (*)
  fed99d7... Merge branch 'wip/cdavis/hdywindow' (*)
  5b4e1dc... Prepared release 40.alpha (*)
  20a461c... Post-release version bump to 40.beta (*)
  9c7d5cc... Update Ukrainian translation (*)
  2fe58eb... Update Swedish translation (*)
  68f8ce4... Update Catalan translation (*)
  111ed3a... Update Galician translation (*)
  a8e85c9... Fixed CI build (*)
  74ee52c... Fixed CI build (*)
  709bc5f... Update Slovenian translation (*)
  4b93ed6... Fix CI build and first-load of currencies (*)
  38fb887... Added support for sync and async currency loading (*)
  6385d4d... Merge branch 'master' into wip/currency-conversion-plugins
  a343f06... Merge branch 'wip/async-currency' into wip/currency-convers
  aecf053... Use async provider downloads by default

(*) This commit already existed in another branch; no separate mail sent