Update env_logger requirement from 0.7 to 0.8 (#2333)

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)

Signed-off-by: dependabot-preview[bot] <[email protected]>

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

Author: dependabot-preview[bot]

crates/cli/Cargo.toml

@@ -17,7 +17,7 @@ default-run = 'wasm-bindgen'
 [dependencies]
 curl = "0.4.13"
 docopt = "1.0"
-env_logger = "0.7"
+env_logger = "0.8"
 anyhow = "1.0"
 log = "0.4"
 openssl = { version = '0.10.11', optional = true }

crates/webidl/Cargo.toml

@@ -13,7 +13,7 @@ Support for parsing WebIDL specific to wasm-bindgen
 edition = "2018"
 
 [dependencies]
-env_logger = "0.7.0"
+env_logger = "0.8.1"
 anyhow = "1.0"
 heck = "0.3"
 log = "0.4.1"