There is no version check for libadwaita

When I attempted to build phosh with libadwaita 1.4, I've got the following warning:

<command-line>: warning: "ADW_VERSION_1_5" is not defined, evaluates to 0 [-Wundef]
/usr/include/libadwaita-1/adw-version.h:150:5: note: in expansion of macro ‘ADW_VERSION_MIN_REQUIRED’
  150 | #if ADW_VERSION_MIN_REQUIRED >= ADW_VERSION_1_1
      |     ^~~~~~~~~~~~~~~~~~~~~~~~

I believe it should raise an error and stop compilation (e.g. with Meson check or -Werror=undef).