build: bump serde from 1.0.33 to 1.0.37

[dependabot-preview]

Bumps serde from 1.0.33 to 1.0.37.

Release notes

Sourced from serde's releases.

v1.0.37

• Better error messages for unsupported uses of serde(flatten) (#1204 and #1205, thanks mitsuhiko)

v1.0.36

• Emit working code in the case of remote = "Self" attribute (#1196)

v1.0.35

• Implement Serialize and Deserialize for unsigned std::num::NonZero* types (#1191, tracking issue https://github-redirect.dependabot.com/rust-lang/rust/issues/49137, thanks SimonSapin)

v1.0.34

• Add a flatten attribute to remove one level of structure between the serialized representation and the Rust data structure; more details in struct flattening (#1179, thanks mitsuhiko)

Commits

• eed18ff Release 1.0.37
• f8e1fa8 Use Generics::make_where_clause helper
• 860241a Merge pull request #1205 from mitsuhiko/bugfix/tuple-struct-flatten
• 6f6c608 Merge pull request #1204 from mitsuhiko/bugfix/flatten-struct-variant
• 77376f3 Produce error message for use of flatten in tuple structs
• 302fac9 Produce error message for use of flatten within struct variant
• 9c659d9 Format with rustfmt 0.4.1
• 21698f2 Merge pull request #1201 from alexcrichton/proc-macro2-v3
• ba002e1 Update signature of Lifetime::new
• 8b44eb8 Add parens to TraitBound
• Additional commits viewable in compare view

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