Update Rust crate async-trait to 0.1.68

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
async-trait	dependencies	patch	0.1.57 -> 0.1.68

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Release Notes

dtolnay/async-trait

### [`v0.1.68`](https://togithub.com/dtolnay/async-trait/releases/tag/0.1.68) [Compare Source](https://togithub.com/dtolnay/async-trait/compare/0.1.67...0.1.68) - Improve error message if an async fn is written without a function body in an impl block ### [`v0.1.67`](https://togithub.com/dtolnay/async-trait/releases/tag/0.1.67) [Compare Source](https://togithub.com/dtolnay/async-trait/compare/0.1.66...0.1.67) - Update syn dependency to 2.x ### [`v0.1.66`](https://togithub.com/dtolnay/async-trait/releases/tag/0.1.66) [Compare Source](https://togithub.com/dtolnay/async-trait/compare/0.1.65...0.1.66) - Set html_root_url attribute ### [`v0.1.65`](https://togithub.com/dtolnay/async-trait/releases/tag/0.1.65) [Compare Source](https://togithub.com/dtolnay/async-trait/compare/0.1.64...0.1.65) - Fix interaction with rustc's single_use_lifetimes lint ([#​238](https://togithub.com/dtolnay/async-trait/issues/238), [#​239](https://togithub.com/dtolnay/async-trait/issues/239)) ### [`v0.1.64`](https://togithub.com/dtolnay/async-trait/releases/tag/0.1.64) [Compare Source](https://togithub.com/dtolnay/async-trait/compare/0.1.63...0.1.64) - Suppress async_yields_async clippy correctness lint in generated code ([#​236](https://togithub.com/dtolnay/async-trait/issues/236), [#​237](https://togithub.com/dtolnay/async-trait/issues/237)) ### [`v0.1.63`](https://togithub.com/dtolnay/async-trait/releases/tag/0.1.63) [Compare Source](https://togithub.com/dtolnay/async-trait/compare/0.1.62...0.1.63) - Do not require Sync on unused shared reference arguments ([#​232](https://togithub.com/dtolnay/async-trait/issues/232), [#​233](https://togithub.com/dtolnay/async-trait/issues/233)) - Make expansion of nested `_` and `..` patterns edition independent ([#​234](https://togithub.com/dtolnay/async-trait/issues/234), [#​235](https://togithub.com/dtolnay/async-trait/issues/235)) ### [`v0.1.62`](https://togithub.com/dtolnay/async-trait/releases/tag/0.1.62) [Compare Source](https://togithub.com/dtolnay/async-trait/compare/0.1.61...0.1.62) - Improve error message involving elided lifetimes ([#​229](https://togithub.com/dtolnay/async-trait/issues/229)) ### [`v0.1.61`](https://togithub.com/dtolnay/async-trait/releases/tag/0.1.61) [Compare Source](https://togithub.com/dtolnay/async-trait/compare/0.1.60...0.1.61) - Fix async function signatures that involve #\[cfg(...)] attributes on parameters ([#​227](https://togithub.com/dtolnay/async-trait/issues/227), thanks [@​azriel91](https://togithub.com/azriel91)) ### [`v0.1.60`](https://togithub.com/dtolnay/async-trait/releases/tag/0.1.60) [Compare Source](https://togithub.com/dtolnay/async-trait/compare/0.1.59...0.1.60) - Documentation improvements ### [`v0.1.59`](https://togithub.com/dtolnay/async-trait/releases/tag/0.1.59) [Compare Source](https://togithub.com/dtolnay/async-trait/compare/0.1.58...0.1.59) - Support `self: Arc` async methods that have a default implementation provided by the trait ([#​210](https://togithub.com/dtolnay/async-trait/issues/210)) ### [`v0.1.58`](https://togithub.com/dtolnay/async-trait/releases/tag/0.1.58) [Compare Source](https://togithub.com/dtolnay/async-trait/compare/0.1.57...0.1.58) - Improve rust-analyzer "go to definition" on the method names of an async trait ([#​218](https://togithub.com/dtolnay/async-trait/issues/218))

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