Update syn requirement from 2 to 3 - #10

The process '/home/runner/.cargo/bin/cargo' failed with exit code 101

pattern does not mention field `modifiers`

struct `syn::ImplItemFn` does not have a field named `defaultness`

mismatched types

pattern does not mention field `modifiers`

struct `syn::ItemImpl` does not have a field named `defaultness`

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions-rs/cargo@v1, actions-rs/toolchain@v1, actions/checkout@v2. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

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/

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/

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/