Bump serde_derive from 1.0.36 to 1.0.37

[dependabot-preview]

Bumps serde_derive from 1.0.36 to 1.0.37.

Release notes

Sourced from serde_derive's releases.

v1.0.37

• Better error messages for unsupported uses of serde(flatten) (#1204 and #1205, 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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[dependabot-preview]

Superseded by #38.