Update env_logger requirement from 0.7.0 to 0.8.1 (#182)

Updates the requirements on [env_logger](https://github.com/env-logger-rs/env_logger) to permit the latest version.
- [Release notes](https://github.com/env-logger-rs/env_logger/releases)
- [Changelog](https://github.com/env-logger-rs/env_logger/blob/master/CHANGELOG.md)
- [Commits](rust-cli/env_logger@v0.7.0...v0.8.1)

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Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Cargo.toml

@@ -35,7 +35,7 @@ wasmparser = "0.62.0"
 parallel = ['rayon', 'id-arena/rayon']
 
 [dev-dependencies]
-env_logger = "0.7.0"
+env_logger = "0.8.1"
 criterion = "0.3.0"
 
 [workspace]

crates/fuzz-utils/Cargo.toml

@@ -7,7 +7,7 @@ publish = false
 
 [dependencies]
 anyhow = "1.0"
-env_logger = "0.7.0"
+env_logger = "0.8.1"
 rand = { version = "0.7.0", features = ['small_rng'] }
 tempfile = "3.1.0"
 wasmparser = "0.61"

crates/tests/Cargo.toml

@@ -10,7 +10,7 @@ walkdir = "2.2.9"
 
 [dev-dependencies]
 anyhow = "1.0"
-env_logger = "0.7.0"
+env_logger = "0.8.1"
 serde = { version = "1.0.99", features = ['derive'] }
 serde_json = { version = "1.0.40", features = ['preserve_order'] }
 tempfile = "3.1.0"