deps: bump serde from 1.0.213 to 1.0.217

[dependabot[bot]]

Bumps serde from 1.0.213 to 1.0.217.

Release notes

Sourced from serde's releases.

v1.0.217

• Support serializing externally tagged unit variant inside flattened field (#2786, thanks @​Mingun)

v1.0.216

• Mark all generated impls with #[automatically_derived] to exclude from code coverage (#2866, #2868, thanks @​tdittr)

v1.0.215

• Produce warning when multiple fields or variants have the same deserialization name (#2855, #2856, #2857)

v1.0.214

• Implement IntoDeserializer for all Deserializers in serde::de::value module (#2568, thanks @​Mingun)

Commits

• 930401b Release 1.0.217
• cb6eaea Fix roundtrip inconsistency:
• b6f339c Resolve repr_packed_without_abi clippy lint in tests
• 2a5caea Merge pull request #2872 from dtolnay/ehpersonality
• b9f93f9 Add no-std CI on stable compiler
• eb5cd47 Drop #[lang = "eh_personality"] from no-std test
• 8478a3b Merge pull request #2871 from dtolnay/nostdstart
• dbb9091 Replace #[start] with extern fn main
• ad8dd41 Release 1.0.216
• f91d2ed Merge pull request #2868 from dtolnay/automaticallyderived
• Additional commits viewable in compare view

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