chore: Bump async-recursion from 1.0.2 to 1.0.4 (#1286)

Bumps [async-recursion](https://github.com/dcchut/async-recursion) from 1.0.2 to 1.0.4.
- [Release notes](https://github.com/dcchut/async-recursion/releases)
- [Commits](dcchut/async-recursion@v1.0.2...v1.0.4)

---
updated-dependencies:
- dependency-name: async-recursion
  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>

core/Cargo.toml

@@ -14,7 +14,7 @@ repository = "https://github.com/reacherhq/check-if-email-exists"
 
 [dependencies]
 async-native-tls = { version = "0.4", default-features = false }
-async-recursion = "1.0.2"
+async-recursion = "1.0.4"
 async-smtp = { version = "0.6.0", features = ["socks5"] }
 async-std = "1.12.0"
 async-std-resolver = "0.21.2"