fix(deps): update rust crate log to 0.4.20

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
log	dependencies	patch	0.4.6 -> 0.4.20

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Release Notes

rust-lang/log (log)

v0.4.20

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• Remove rustversion dev-dependency by @​Thomasdezeeuw in https://github.com/rust-lang/log/pull/568
• Remove local_inner_macros usage by @​EFanZh in https://github.com/rust-lang/log/pull/570

v0.4.19

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• Use target_has_atomic instead of the old atomic_cas cfg by @​GuillaumeGomez in https://github.com/rust-lang/log/pull/555
• Put MSRV into Cargo.toml by @​est31 in https://github.com/rust-lang/log/pull/557

v0.4.18

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• fix markdown links (again) by @​hellow554 in https://github.com/rust-lang/log/pull/513
• add cargo doc to workflow by @​hellow554 in https://github.com/rust-lang/log/pull/515
• Apply Clippy lints by @​hellow554 in https://github.com/rust-lang/log/pull/516
• Replace ad-hoc eq_ignore_ascii_case with slice::eq_ignore_ascii_case by @​glandium in https://github.com/rust-lang/log/pull/519
• fix up windows targets by @​KodrAus in https://github.com/rust-lang/log/pull/528
• typo fix by @​jiangying000 in https://github.com/rust-lang/log/pull/529
• Remove dependency on cfg_if by @​EriKWDev in https://github.com/rust-lang/log/pull/536
• GitHub Workflows security hardening by @​sashashura in https://github.com/rust-lang/log/pull/538
• Fix build status badge by @​atouchet in https://github.com/rust-lang/log/pull/539
• Add call_logger to the documentation by @​a1ecbr0wn in https://github.com/rust-lang/log/pull/547
• Use stable internals for key-value API by @​KodrAus in https://github.com/rust-lang/log/pull/550
• Change wording of list of implementations by @​Thomasdezeeuw in https://github.com/rust-lang/log/pull/553
• Add std-logger to list of implementations by @​Thomasdezeeuw in https://github.com/rust-lang/log/pull/554
• Add set_max_level_racy and gate set_max_level by @​djkoloski in https://github.com/rust-lang/log/pull/544
• [doc] src/lib.rs : prefix an unused variable with an underscore by @​OccupyMars2025 in https://github.com/rust-lang/log/pull/561
• [doc] src/macros.rs : correct grammar errors of an example in lib documentation by @​OccupyMars2025 in https://github.com/rust-lang/log/pull/562

v0.4.17

• Update kv_unstable internal dependencies.

v0.4.16

• Fix a conflict with unqualified Option use in macros.

v0.4.15

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• Silence a warning about the deprecated spin_loop_hint.
• Relax ordering in the atomic set_max_level call.
• Add thumbv4t-none-eabi to targets that don't support atomics
• Allow levels to be iterated over.
• Implement Log on some common wrapper types.
• Improvements to test coverage.
• Improvements to documentation.
• Add key-value support to the log! macros.
• Tighten kv_unstable internal dependencies so they don't bump past their current alpha.
• Add a simple visit API to kv_unstable.
• Support NonZero* integers as values in structured logging
• Support static strings as keys in structured logging

v0.4.14

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• Remove the __private_api_log_lit special case.
• Fixed incorrect combination of kv_unstable and std features causing compile failures.
• Remove unstable Value::to_* conversions that were incorrectly using as.
• Rename unstable Value::to_error to Value::to_borrowed_error.

v0.4.13

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• This is the same as 0.4.11, except with a kv_unstable_std feature added to aid migrating current dependents to 0.4.14 (which was originally going to be 0.4.13 until it was decided to create a patch from 0.4.11 to minimize disruption).

v0.4.12

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New

• Support platforms without atomics by racing instead of failing to compile
• Implement Log for Box<T: Log>
• Update cfg-if to 1.0
• Internal reworks of the structured logging API. Removed the Fill API
  and added source::as_map and source::as_list to easily serialize a Source
  as either a map of {key: value, ..} or as a list of [(key, value), ..].

Fixed

• Fixed deserialization of LevelFilter to use their u64 index variants

v0.4.11

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New

• Support coercing structured values into concrete types.
• Reference the win_dbg_logger in the readme.

Fixed

• Updates a few deprecated items used internally.
• Fixed issues in docs and expands sections.
• Show the correct build badge in the readme.
• Fix up a possible inference breakage with structured value errors.
• Respect formatting flags in structured value formatting.

v0.4.10

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Fixed

• Fixed the log! macros so they work in expression context (this regressed in 0.4.9, which has been yanked).

v0.4.9

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Minimum Supported Rust Version

This release bumps the minimum compiler version to 1.31.0. This was mainly needed for cfg-if,
but between 1.16.0 and 1.31.0 there are a lot of language and library improvements we now
take advantage of.

New

• Unstable support for capturing key-value pairs in a record using the log! macros

Improved

• Better documentation for max level filters.
• Internal updates to line up with bumped MSRV

v0.4.8

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New

• Support attempting to get Record fields as static strings.

v0.4.7

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New

• Support for embedded environments with thread-unsafe initialization.
• Initial unstable support for capturing structured data under the kv_unstable
  feature gate. This new API doesn't affect existing users and may change in future
  patches (so those changes may not appear in the changelog until it stabilizes).

Improved

• Docs for using log with the 2018 edition.
• Error messages for macros missing arguments.

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