add release snippet for declare_dependency

docs/markdown/snippets/declare_dependency-d-features.md

@@ -0,0 +1,14 @@
+## D features in `declare_dependency`
+
+`declare_dependency`accepts parameters for D specific features.
+Accepted new parameters are `d_module_features` and `d_import_dirs`.
+
+This can be useful to propagate conditional compilation versions. E.g.:
+
+```meson
+my_lua_dep = declare_dependency(
+    # ...
+    d_module_features: ['LUA_53'],
+    d_import_dirs: include_directories('my_lua_folder'),
+)
+```