Add support for ICal >= 4.0.0

[ryonakano]

Related: elementary/contacts#49 (but newer versions)

Changes Summary

• Flatpak
  • libical: Update libical-3.0.20.tar.gz to 4.0.5
  • evolution-data-server: Update evolution-data-server-3.56.2.tar.xz to 3.62.5
  • libical: Follow CMake options changes
    • See https://github.com/libical/libical/blob/4.0/docs/MigrationGuide_to_4.md
• Source code
  • Use ICal.Duration.extend() instead of ICal.Time.add()
  • Use ICal.Duration.from_time() instead of Ical.Time.substract()
  • Use ICal.Duration.as_seconds() instead of ICal.Duration.as_int()
    • See https://libical.github.io/libical/v4/apidocs/md__2home_2winterz_2projects_2libical_2libical_2docs_2MigrationGuide__to__4.html