Vala 0.56.0
===========
 * Various improvements and bug fixes:
  - codegen: Drop confusing warning when accessing interface members

 * Bindings:
  - Add webkit2gtk-4.1 bindings
  - glib-2.0: Fix memory management of TestSuite.add*/get_root() with 2.70 [#1295]
  - libarchive: Fix a few binding errors
  - SDL2_ttf: Fix a few binding errors
  - tiff: Fix a few binding errors