Update whoami requirement from 1.2.1 to 2.1.0

Updates the requirements on [whoami](https://github.com/ardaku/whoami) to permit the latest version.
- [Release notes](https://github.com/ardaku/whoami/releases)
- [Commits](ardaku/whoami@v1.2.1...v2.1.0)

---
updated-dependencies:
- dependency-name: whoami
  dependency-version: 2.1.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

Cargo.toml

@@ -26,7 +26,7 @@ categories = ["graphics", "gui", "multimedia", "rendering", "rendering::engine"]
 [dependencies]
 dl_api = "0.4"
 human = "0.2"
-whoami = "1.2.1"
+whoami = "2.1.0"
 
 [features]
 default = []