[transition] heck 0.4 -> 0.5

Key:

• checked = version that works with 0.5 is uploaded or patch available
• strikethrough = version that works with 0.5 is in unstable
• 🤝 = not pkg-rust maintained package

• cyme 🤝
• hippotat 🤝
• python-cramjam 🤝 https://bugs.debian.org/1117191 FTBFS in unstable, so not a blocker
• rust-axum 🤝
• rust-cbindgen
• rust-clap-derive
• rust-clap-derive-3
• rust-const-str
• rust-const-str-proc-macro
• rust-deluxe-macros
• rust-derive-deftly 🤝
• rust-dsl-auto-type
• rust-enum-as-inner
• rust-glib-macros
• rust-glib-macros-0.18 🤝 https://bugs.debian.org/1117192
• rust-gsettings-macro
• rust-handlebars
• rust-hstr 🤝
• rust-just
• rust-knuffel-derive
• rust-numbat
• rust-postgres-derive
• rust-prost-build
• rust-pyo3-macros-backend
• rust-snafu-derive
• rust-sqlx-macros-core
• rust-structopt-derive
• rust-strum-macros
• rust-system-deps
• rust-tabled-derive
• sdml 🤝
• tree-sitter 🤝