rust: bump serde from 1.0.122 to 1.0.123

[dependabot]

Bumps serde from 1.0.122 to 1.0.123.

Release notes

Sourced from serde's releases.

v1.0.123

• Support Self keywords in fields of types that derive Deserialize (#1830, thanks @taiki-e)
• Allow floats to be deserialized from ints in tagged unions (#1842, thanks @Timmmm)
• Support Self inside fields that use serialize_with (#1970)

Commits

• 3d6c414 Release 1.0.123
• 29cdf88 Merge pull request #1970 from serde-rs/self
• 2ba9739 Substitute Self in output of Serialize derive
• 6699b0b Add regression test for issue 1969
• b054ea4 Ignore some pedantic lints in serde_derive_internals from PR 1830
• e5efb6a Remove dependency on syn/visit-mut feature
• 1f42358 Deduplicate token stream respanner
• 033114a Touch up PR 1830
• 7cec99c Pare down PR 1830
• 6c5bf70 Merge pull request 1830 from taiki-e/self
• Additional commits viewable in compare view

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[codecov]

Codecov Report

Merging #3652 (f4ee9c9) into master (18303c4) will decrease coverage by 0.15%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #3652      +/-   ##
==========================================
- Coverage   67.27%   67.12%   -0.16%     
==========================================
  Files         390      390              
  Lines       36682    36682              
==========================================
- Hits        24679    24621      -58     
- Misses       8534     8582      +48     
- Partials     3469     3479      +10     

Impacted Files	Coverage Δ
go/oasis-node/cmd/common/metrics/disk.go	65.38% <0.00%> (-19.24%)	⬇️
go/consensus/tendermint/api/api.go	74.66% <0.00%> (-10.67%)	⬇️
go/oasis-node/cmd/common/metrics/resource.go	78.94% <0.00%> (-10.53%)	⬇️
go/storage/api/metrics.go	81.53% <0.00%> (-9.24%)	⬇️
go/common/sgx/aesm/aesm.go	62.61% <0.00%> (-6.55%)	⬇️
go/storage/mkvs/prefetch.go	54.71% <0.00%> (-3.78%)	⬇️
go/worker/storage/service_external.go	44.44% <0.00%> (-3.71%)	⬇️
go/runtime/host/sgx/sgx.go	69.23% <0.00%> (-2.20%)	⬇️
go/consensus/tendermint/apps/registry/genesis.go	39.80% <0.00%> (-1.95%)	⬇️
go/storage/client/client.go	71.49% <0.00%> (-1.94%)	⬇️
... and 22 more

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