Bump env_logger from 0.8.3 to 0.8.4 (use-ink#294)

Bumps [env_logger](https://github.com/env-logger-rs/env_logger) from 0.8.3 to 0.8.4.
- [Release notes](https://github.com/env-logger-rs/env_logger/releases)
- [Changelog](https://github.com/env-logger-rs/env_logger/blob/main/CHANGELOG.md)
- [Commits](rust-cli/env_logger@v0.8.3...v0.8.4)

---
updated-dependencies:
- dependency-name: env_logger
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Cargo.toml

@@ -19,7 +19,7 @@ categories = ["command-line-utilities", "development-tools::build-utils", "devel
 include = ["Cargo.toml", "src/**/*.rs", "README.md", "LICENSE", "build.rs", "templates"]
 
 [dependencies]
-env_logger = "0.8.3"
+env_logger = "0.8.4"
 anyhow = "1.0.41"
 structopt = "0.3.21"
 log = "0.4.14"