Bump serde from 1.0.193 to 1.0.194

[dependabot[bot]]

Bumps serde from 1.0.193 to 1.0.194.

Release notes

Sourced from serde's releases.

v1.0.194

• Update proc-macro2 to fix caching issue when using a rustc-wrapper such as sccache

Commits

• d2d977a Release 1.0.194
• a9a6ee9 Pull in proc-macro2 sccache fix
• 28c5d21 Merge pull request #2669 from dtolnay/optionifletelse
• 3d6a789 Remove option_if_let_else clippy suppression
• a0e6869 Work around doc_link_with_quotes pedantic clippy lint
• See full diff in compare view

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[dependabot[bot]]

Superseded by #120.