Merge pull request #57 from aramperes/chore/update-docker-rust-version · aramperes/onetun@767b83d

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 `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/

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/

unused import: `std::collections::HashSet`

unused import: `std::fs::read_to_string`

constant `DEFAULT_PORT_FORWARD_SOURCE` is never used

function `parse_addr` is never used

function `parse_ip` is never used

function `parse_private_key` is never used

function `parse_public_key` is never used

function `parse_preshared_key` is never used

function `parse_keep_alive` is never used

function `parse_mtu` is never used

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