pango: Re-export v1_54 feature

Author: bilelmoussaoui

pango/Cargo.toml

@@ -20,6 +20,7 @@ v1_46 = ["v1_44", "ffi/v1_46"]
 v1_48 = ["v1_46", "ffi/v1_48"]
 v1_50 = ["v1_48", "ffi/v1_50"]
 v1_52 = ["v1_50", "ffi/v1_52"]
+v1_54 = ["v1_52", "ffi/v1_54"]
 
 [dependencies]
 ffi = { package = "pango-sys", path = "sys", version = "0.20" }