Expose new cfgs

Author: GuillaumeGomez

atk/Cargo.toml

@@ -22,6 +22,8 @@ v2_30 = ["ffi/v2_30"]
 v2_32 = ["v2_30", "ffi/v2_32"]
 v2_34 = ["v2_32", "ffi/v2_34"]
 v2_38 = ["v2_34", "ffi/v2_38"]
+v2_46 = ["v2_38", "ffi/v2_46"]
+v2_50 = ["v2_46", "ffi/v2_50"]
 
 [package.metadata.docs.rs]
 rustdoc-args = ["--cfg", "docsrs", "--generate-link-to-definition"]