Pin ion-rs version to 1.0.0-rc.7; bump version to v0.7.1 (#157) · amazon-ion/ion-cli@55fd852

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 following actions use a deprecated Node.js version and will be forced to run on node20: actions/checkout@v2, 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/

unused import: `std::fmt::format`

`ion-cli` (test "code-gen-tests") generated 1 warning (run `cargo fix --test "code-gen-tests"` to apply 1 suggestion)

unused import: `IonResult`

field `source` is never read

field `description` is never read

associated items `new`, `a`, `c`, and `b` are never used

associated items `new`, `d`, and `e` are never used

associated items `new` and `value` are never used

associated items `new` and `value` are never used

associated items `new`, `a`, `c`, `b`, and `d` are never used

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/

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