build(deps): bump serde from 1.0.139 to 1.0.143 in /atcoder-problems-backend

[dependabot[bot]]

Bumps serde from 1.0.139 to 1.0.143.

Release notes

Sourced from serde's releases.

v1.0.143

• Invert build.rs cfgs in serde_test to produce the most modern configuration in the default case (#2253, thanks @​taiki-e)

v1.0.142

• Add keywords to crates.io metadata

v1.0.141

• Add no-std category to crates.io metadata

v1.0.140

• Invert serde_derive cfgs to convenience non-Cargo builds on a modern toolchain (#2251, thanks @​taiki-e)

Commits

• 3d02516 Release 1.0.143
• 7770da4 Merge pull request #2253 from taiki-e/test-cfg
• a5fd85a Invert build.rs cfgs in serde_test
• abb2a84 Release 1.0.142
• a31d0be Update keywords in crates.io metadata
• d786e75 Release 1.0.141
• 10e4839 Move Postcard link up to Bincode spot
• 85e7265 Add categories to crates.io metadata
• c9cc8a8 Add authors to Cargo.toml
• a925ce4 Sort package entries in Cargo.toml
• Additional commits viewable in compare view

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