Update Rust crate thiserror to 1.0.50

This MR contains the following updates:

Package	Type	Update	Change
thiserror	dependencies	patch	1.0.37 -> 1.0.50

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Release Notes

dtolnay/thiserror (thiserror)

v1.0.50

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• Improve diagnostic when a #[source], #[from], or #[transparant] attribute refers to a type that has no std::error::Error impl (#​258, thanks @​de-vri-es)

v1.0.49

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• Access libcore types through ::core in generated code (#​255, thanks @​mina86)

v1.0.48

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• Improve implementation of displaying Path values in a generated Display impl (#​251, thanks @​mina86)

v1.0.47

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• Work around rust-analyzer bug (https://github.com/rust-lang/rust-analyzer/issues/9911)

v1.0.46

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• Add bootstrap workaround to allow rustc to depend on thiserror (#​248, thanks @​RalfJung)

v1.0.45

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• Update backtrace support to nightly's new Error::provide API (https://github.com/rust-lang/rust/pull/113464, #​246)

v1.0.44

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• Documentation improvements

v1.0.43

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v1.0.42

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• Fix compile error in derived Display impl if there was a nonstandard write! macro in scope (#​239)

v1.0.41

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v1.0.40

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• Update syn dependency to 2.x

v1.0.39

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• Set html_root_url attribute

v1.0.38

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• Documentation improvements

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