Proxy derive macros, rustc plugin codegen, safety improvements · makspll/bevy_mod_scripting@d09ae47

The following actions uses node12 which is deprecated and will be forced to run on node16: actions/checkout@v2, actions-rs/toolchain@v1, actions-rs/cargo@v1. For more info: https://github.blog/changelog/2023-06-13-github-actions-all-actions-will-run-on-node16-instead-of-node12-by-default/

The `set-output` command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

unused imports: `Colon`, `Expr`, `Token`, `TraitItem`

unused macro definition: `impl_parse_enum`

unused import: `impl_parse_enum`

`bevy_mod_scripting_common` (lib) generated 3 warnings (run `cargo fix --lib -p bevy_mod_scripting_common` to apply 2 suggestions)

unused import: `HashSet`

`bevy_mod_scripting_lua_derive` (lib) generated 1 warning (run `cargo fix --lib -p bevy_mod_scripting_lua_derive` to apply 1 suggestion)

unused imports: `format_ident`, `quote_spanned`

unused imports: `DeriveInput`, `parse_macro_input`

unused import: `spanned::Spanned`

`bevy_mod_scripting_derive` (lib) generated 3 warnings (run `cargo fix --lib -p bevy_mod_scripting_derive` to apply 2 suggestions)

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