Bump serde_json from 1.0.61 to 1.0.73 in /packer

[dependabot]

Bumps serde_json from 1.0.61 to 1.0.73.

Release notes

Sourced from serde_json's releases.

v1.0.73

• Update itoa dependency to 1.0

v1.0.72

• Interpret \u-encoded lone surrogates when deserializing into a byte string (#828, #829, thanks @​lucacasonato)

v1.0.71

• Add serde_json::Map::get_key_value (#821, thanks @​timothee-haudebourg)
• Add impl From<Box<RawValue>> for Box<str> (#824, thanks @​jplatte)

v1.0.70

• Add serde_json::Map::retain method (#822, thanks @​deankarn)

v1.0.69

• Implement Hash for serde_json::Number (#814, thanks @​timothee-haudebourg)

v1.0.68

• Preserve negative sign of -0 when deserializing to f32 or f64 (#799, #801)

v1.0.67

• Fix inconsistency of deserialization of unknown fields in a struct variant from bytes vs from Value (#795)

v1.0.66

• Preserve exponent signifier and unary plus in exponent of arbitrary_precision numbers (#786, thanks @​ruifengx)

v1.0.65

• Documentation improvements

v1.0.64

• Fix deserialization panic on deserializing RawValue from a slice containing non-utf8 bytes (#755)

v1.0.63

• Provide Entry::and_modify method on serde_json::map::Entry (#754, thanks @​Krout0n)

v1.0.62

• Speed up Display impl of serde_json::Value by 33% (#751, thanks @​icewind1991)

Commits

• 296f718 Release 1.0.73
• 48455de Update to itoa 1.0
• b66b0eb Track raw pointers in miri CI run
• 52eec5e Add a miri test job in CI
• aaaf125 Disable TcpStream test on miri
• f0774c4 Raise required rustc from 1.31 to 1.36
• c3eddcd Collect imports to top of test suite
• a28529d Skip ui test when running in miri
• 7db1ea9 Ignore needless_late_init Clippy lint
• fc0ca07 Merge pull request #831 from serde-rs/from_u32
• Additional commits viewable in compare view

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[coveralls]

Pull Request Test Coverage Report for Build 1602137357

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 7 unchanged lines in 4 files lost coverage.
• Overall coverage increased (+0.04%) to 46.0%

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Files with Coverage Reduction	New Missed Lines	%
desktop/app/src/sandy-chrome/appinspect/LaunchEmulator.tsx	1	63.64%
desktop/app/src/MenuBar.tsx	2	33.33%
desktop/app/src/reducers/settings.tsx	2	78.26%
desktop/test-utils/lib/pathUtils.js	2	66.67%

Totals
Change from base Build 505542275:	0.04%
Covered Lines:	5753
Relevant Lines:	11196

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💛 - Coveralls

[dependabot]

Superseded by #372.