Fix histogram feature grouping on next-release-devel · plotters-rs/plotters@65de107

The following actions uses node12 which is deprecated and will be forced to run on node16: 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 following actions use a deprecated Node.js version and will be forced to run on node20: actions-rs/toolchain@v1, actions-rs/cargo@v1. For more info: https://github.blog/changelog/2024-03-07-github-actions-all-actions-will-run-on-node20-instead-of-node16-by-default/

virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`

/Users/runner/work/plotters/plotters/plotters-bitmap/Cargo.toml: `default_features` is deprecated in favor of `default-features` and will not work in the 2024 edition

/Users/runner/work/plotters/plotters/plotters/Cargo.toml: `default_features` is deprecated in favor of `default-features` and will not work in the 2024 edition

/Users/runner/work/plotters/plotters/plotters-svg/Cargo.toml: `default_features` is deprecated in favor of `default-features` and will not work in the 2024 edition

plotters-svg/src/svg.rs#L33

unexpected `cfg` condition value: `deprecated_items`

plotters-svg/src/svg.rs#L42

unexpected `cfg` condition value: `deprecated_items`

plotters-svg/src/svg.rs#L151

unexpected `cfg` condition value: `deprecated_items`

plotters-svg/src/svg.rs#L486

unexpected `cfg` condition value: `image`

plotters-svg/src/svg.rs#L206

unexpected `cfg` condition value: `deprecated_items`

`plotters-svg` (lib) generated 5 warnings