Bump env_logger from 0.7.1 to 0.8.3

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Bumps env_logger from 0.7.1 to 0.8.3.

Release notes

Sourced from env_logger's releases.

0.8.3

New features:

• Suffix customization for the default formatter (Builder::format_suffix) #192

Improvements:

• Improve documentation about log level names #189

Bug fixes:

• Ignore whitespace-only filter specifications #188
• Remove unneded files from crates.io tarball (including rust-toolchain whose presence caused issues for a few people)

0.8.2

Fixed a panic on io errors when writing to stdout / stderr (#184).

0.8.1

Update links in the documentation that were pointing to the old repository location.

0.8.0

Breaking changes:

• Update public dependency humantime to 2.0

Improvements:

• Update default colors for debug (white => blue) and trace (black => cyan)

Deprecations:

• env_logger::from_env has been deprecated in favor of env_logger::Builder::from_env

This release raises the minimum supported Rust version to 1.41.0.

Commits

• 67adcba Re-add tests to the crates.io tarball
• c9f033d Release version 0.8.3
• eed1651 Only include necessary files in crates.io tarballs
• 664ca1a Don't deny(warnings)
• 8ef1615 Merge pull request #192 from jthacker/feat/custom-suffix
• 894bfcd Add suffix customization to default formatter.
• 035cda8 docs: fix markdown typo from 484ca2b2f5e0
• eb50f9d Merge pull request #188 from salewski/ads/parse-spec-ignore-blank-spec
• a36b72d Merge pull request #189 from salewski/ads/parse-spec-raw-level-tests
• 780e7c5 [2 of 2]: filter::parse_spec() ignore bogon empty, blank substrings
• Additional commits viewable in compare view

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