Makes IonSchemaElement use borrowed Elements (#222) · amazon-ion/ion-schema-rust@4b27d7f

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/checkout@v3, 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/

profiles for the non root package will be ignored, specify profiles at the workspace root:

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

type `SchemaHeader` is more private than the item `SchemaContent::Header::0`

type `SchemaFooter` is more private than the item `SchemaContent::Footer::0`

`ion-schema` (lib) generated 2 warnings

unused `Result` that must be used

unused `Result` that must be used

unused `Result` that must be used

`ion-schema` (lib test) generated 332 warnings (329 duplicates)

the following packages contain code that will be rejected by a future version of Rust: rstest v0.9.0

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/

profiles for the non root package will be ignored, specify profiles at the workspace root:

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

type `SchemaHeader` is more private than the item `SchemaContent::Header::0`

type `SchemaFooter` is more private than the item `SchemaContent::Footer::0`

`ion-schema` (lib) generated 2 warnings

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