Bump serde from 1.0.223 to 1.0.228

[dependabot[bot]]

Bumps serde from 1.0.223 to 1.0.228.

Release notes

Sourced from serde's releases.

v1.0.228

• Allow building documentation with RUSTDOCFLAGS='--cfg=docsrs' set for the whole dependency graph (#2995)

v1.0.227

• Documentation improvements (#2991)

v1.0.226

• Deduplicate variant matching logic inside generated Deserialize impl for adjacently tagged enums (#2935, thanks @​Mingun)

v1.0.225

• Avoid triggering a deprecation warning in derived Serialize and Deserialize impls for a data structure that contains its own deprecations (#2879, thanks @​rcrisanti)

v1.0.224

• Remove private types being suggested in rustc diagnostics (#2979)

Commits

• a866b33 Release 1.0.228
• 5adc9e8 Merge pull request #2995 from dtolnay/rustdocflags
• ab58178 Workaround for RUSTDOCFLAGS='--cfg=docsrs'
• 415d9fc Release 1.0.227
• 7c58427 Merge pull request #2991 from dtolnay/inlinecoredoc
• 9d3410e Merge pull request #2992 from dtolnay/inplaceseed
• 2fb6748 Remove InPlaceSeed public re-export
• f8137c7 Inline serde_core into serde in docsrs mode
• b7dbf7e Merge pull request #2990 from dtolnay/integer128
• 7c83691 No longer macro_use integer128 module
• Additional commits viewable in compare view

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