Log Message:
vala: update to 0.56.2.

Vala 0.56.2
===========
 * Various improvements and bug fixes:
  - codegen: Correctly set array-length for NoAccessorMethods properties [#1316]
  - codegen: Detect usage of static type-parameter in runtime context [#1326]
  - vala: Avoid critical in SourceFile.get_mapped_length() [#1330]
  - codegen: Make sure to initialize static collections
  - codegen: Split reserved identifiers for C and Vala
  - codegen: Check cname of fields and methods against reserved identfiers [#1329]

 * Bindings:
  - glib2.0: Add abs() to int8/int16/int32/ssize_t [#1328]
  - Add initial wayland-client binding
  - Add geocode-glib-2.0 binding
  - Add rest-1.0 bindings