Update async-compression requirement from 0.3 to 0.4

[dependabot[bot]]

Updates the requirements on async-compression to permit the latest version.

Release notes

Sourced from async-compression's releases.

async-compression: v0.4.0

• Level::Precise variant now takes a i32 instead of u32.
• Add top level zstd module containing stable zstd crate wrapper types.
• Add ZstdEncoder::with_quality_and_params() constructors.
• Update zstd dependency to 0.12.
• Remove deprecated stream, futures-bufread and futures-write crate features.
• Remove Tokio 0.2.x and 0.3.x support (tokio-02 and tokio-03 crate features).

Changelog

Sourced from async-compression's changelog.

0.4.0 - 2023-05-10

• Level::Precise variant now takes a i32 instead of u32.
• Add top level zstd module containing stable zstd crate wrapper types.
• Add ZstdEncoder::with_quality_and_params() constructors.
• Update zstd dependency to 0.12.
• Remove deprecated stream, futures-bufread and futures-write crate features.
• Remove Tokio 0.2.x and 0.3.x support (tokio-02 and tokio-03 crate features).

0.3.15 - 2022-10-08

• Level::Default::into_zstd() now returns zstd's default value 3.
• Fix endianness when reading the extra field of a gzip header.

Commits

• d758c13 Merge pull request #216 from Nullus157/rel-040
• 44fe00f chore: prepare async-compression release 0.4.0
• 53fee02 Merge pull request #134 from joshtriplett/zstd-params
• 70c64f8 Merge pull request #217 from Nullus157/support-negative-level
• 466ce00 Add ZstdEncoder::with_quality_and_params to enable compression parameters
• 8349a84 Update changelog
• ab9a2c0 Restrict compression level for brotli to be >= 0
• df5cdd9 Apply suggestions from code review
• 95ae6fe Accept negative Level::Precise
• 5a6b15e Merge pull request #215 from Nullus157/rem-def-feat
• Additional commits viewable in compare view

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