Bump serde from 1.0.197 to 1.0.201 in /packer

[dependabot[bot]]

Bumps serde from 1.0.197 to 1.0.201.

Release notes

Sourced from serde's releases.

v1.0.201

• Resolve unexpected_cfgs warning (#2737)

v1.0.200

• Fix formatting of "invalid type" and "invalid value" deserialization error messages containing NaN or infinite floats (#2733, thanks @​jamessan)

v1.0.199

• Fix ambiguous associated item when forward_to_deserialize_any! is used on an enum with Error variant (#2732, thanks @​aatifsyed)

v1.0.198

• Support serializing and deserializing Saturating<T> (#2709, thanks @​jbethune)

Commits

• b4f1bc1 Release 1.0.201
• 029ab46 Merge pull request #2737 from dtolnay/checkcfg
• 220ca0c Resolve unexpected_cfgs warning
• 20306f4 Fix cfg on test_systemtime_overflow
• cc865ac Release 1.0.200
• 2d973c1 Merge pull request #2733 from jamessan/nan-decimal
• 6ca499b Only format Unexpected::Float with decimal point if it is finite
• 1477028 Release 1.0.199
• 789740b Merge pull request #2732 from aatifsyed/master
• 8fe7539 fix: ambiguous associated type in forward_to_deserialize_any!
• Additional commits viewable in compare view

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[dependabot[bot]]

Superseded by #5615.