Update Rust crate thiserror to 1.0.56

This MR contains the following updates:

Package	Type	Update	Change
thiserror	dependencies	patch	1.0.50 -> 1.0.56

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Release Notes

dtolnay/thiserror (thiserror)

v1.0.56

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• Update proc-macro2 to fix caching issue when using a rustc-wrapper such as sccache

v1.0.55

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v1.0.54

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v1.0.53

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• Reduce spurious rebuilds under RustRover IDE when using a nightly toolchain (#​270)

v1.0.52

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• Fix interaction with RUSTC_BOOTSTRAP (#​269)

v1.0.51

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• Improve diagnostics when an invalid attribute previously caused thiserror to generate no Error impl (#​266)

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