Merge stable 0.13 into main

macros/Cargo.toml

 [package]
 name = "derive-deftly-macros"
-version = "0.13.0"
+version = "0.13.1"
 edition = "2021"
 readme = "README.md"
 authors=["Ian Jackson <ijackson@chiark.greenend.org.uk>",
@@ -9,6 +9,7 @@ license = "MIT"
 description="Macros that implement the derive_deftly crate"
 homepage = "https://gitlab.torproject.org/Diziet/rust-derive-deftly"
 repository = "https://gitlab.torproject.org/Diziet/rust-derive-deftly"
+rust-version = "1.56"
 
 # After editing this file, you will probably need to run
 #   maint/update-bizarre