Update Rust crate tokio to 1.19

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
tokio (source)	dev-dependencies	minor	1.17 -> 1.19
tokio (source)	dependencies	minor	1.17 -> 1.19

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Release Notes

tokio-rs/tokio

### [`v1.19.2`](https://togithub.com/tokio-rs/tokio/compare/tokio-1.19.1...tokio-1.19.2) [Compare Source](https://togithub.com/tokio-rs/tokio/compare/tokio-1.19.1...tokio-1.19.2) ### [`v1.19.1`](https://togithub.com/tokio-rs/tokio/compare/tokio-1.19.0...tokio-1.19.1) [Compare Source](https://togithub.com/tokio-rs/tokio/compare/tokio-1.19.0...tokio-1.19.1) ### [`v1.19.0`](https://togithub.com/tokio-rs/tokio/compare/tokio-1.18.2...tokio-1.19.0) [Compare Source](https://togithub.com/tokio-rs/tokio/compare/tokio-1.18.2...tokio-1.19.0) ### [`v1.18.2`](https://togithub.com/tokio-rs/tokio/compare/tokio-1.18.1...tokio-1.18.2) [Compare Source](https://togithub.com/tokio-rs/tokio/compare/tokio-1.18.1...tokio-1.18.2) ### [`v1.18.1`](https://togithub.com/tokio-rs/tokio/compare/tokio-1.18.0...tokio-1.18.1) [Compare Source](https://togithub.com/tokio-rs/tokio/compare/tokio-1.18.0...tokio-1.18.1) ### [`v1.18.0`](https://togithub.com/tokio-rs/tokio/compare/tokio-1.17.0...tokio-1.18.0) [Compare Source](https://togithub.com/tokio-rs/tokio/compare/tokio-1.17.0...tokio-1.18.0)

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