Change derive macro to use key/value options style. #799

Change derive macro to use key/value options style.

Usage Workflow file

12 warnings

Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: actions/checkout@v2, actions-rs/toolchain@v1, actions-rs/cargo@v1. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.

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/

/home/runner/work/rhai/rhai/Cargo.toml: unused manifest key: patch.crates-io.smartstring.ref

unused variable: `has_e`

variable does not need to be mutable

`rhai` (lib test) generated 2 warnings (2 duplicates)

unused import: `Module`

`rhai` (test "optimizer") generated 1 warning (run `cargo fix --test "optimizer"` to apply 1 suggestion)

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/