Update Rust crate schemars to v0.8.21

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
schemars (source)	dependencies	patch	0.8.10 -> 0.8.21

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Release Notes

GREsau/schemars (schemars)

v0.8.21

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Fixed:

• Fix null default not being set on generated schemas (https://github.com/GREsau/schemars/issues/295 / https://github.com/GREsau/schemars/pull/296)

v0.8.20

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Fixed:

• Revert unintentional change in behaviour when combining default and required attributes (https://github.com/GREsau/schemars/issues/292)

v0.8.19

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Fixed:

• Regression that caused a compile error when deriving JsonSchema on an enum with no variants (https://github.com/GREsau/schemars/issues/287)

v0.8.18

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Fixed:

• Reduce size of MIR output (and improve release-mode compile time) when deriving JsonSchema on enums (https://github.com/GREsau/schemars/pull/266 / https://github.com/GREsau/schemars/pull/286)

v0.8.17

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Changed:

• Update to syn 2.0, which should improve compile times in many cases (https://github.com/GREsau/schemars/pull/281)

v0.8.16

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Fixed:

• Reduce size of MIR output (and improve release-mode compile time) when deriving JsonSchema

v0.8.15

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Added:

• Implement JsonSchema for BigDecimal from bigdecimal 0.4 (https://github.com/GREsau/schemars/pull/237)

v0.8.14

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Added:

• Add #[schemars(inner(...)] attribute to specify schema for array items (https://github.com/GREsau/schemars/pull/234)

Changed:

• New optional associated function on JsonSchema trait: schema_id(), which is similar to schema_name(), but does not have to be human-readable, and defaults to the type name including module path. This allows schemars to differentiate between types with the same name in different modules/crates (https://github.com/GREsau/schemars/issues/62 / https://github.com/GREsau/schemars/pull/247)

Fixed:

• Schemas for rust_decimal::Decimal and bigdecimal::BigDecimal now match how those types are serialized by default, i.e. as numeric strings (https://github.com/GREsau/schemars/pull/248)

v0.8.13

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Added:

• Implement JsonSchema for semver::Version (https://github.com/GREsau/schemars/pull/195 / https://github.com/GREsau/schemars/pull/238)
• Include const generics in generated schema names (https://github.com/GREsau/schemars/pull/179 / https://github.com/GREsau/schemars/pull/239)
• Implement JsonSchema for types from indexmap v2 (https://github.com/GREsau/schemars/pull/226 / https://github.com/GREsau/schemars/pull/240)
• Implement JsonSchema for serde_json::value::RawValue (https://github.com/GREsau/schemars/pull/183)

Changed:

• Minimum supported rust version is now 1.60.0

v0.8.12

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Added:

• Implement JsonSchema for smol_str::SmolStr (https://github.com/GREsau/schemars/pull/72)

Changed:

• Change serde_json dependency min version to 1.0.25 (was 1.0.0) (https://github.com/GREsau/schemars/pull/192)

v0.8.11

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Added:

• Replace auto-inferred trait bounds with bounds specified in #[schemars(bound = "...")] attribute

Changed:

• Derived JsonSchema now respects attributes on unit enum variants (https://github.com/GREsau/schemars/pull/152)
• Minimum supported rust version is now 1.45.0

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