Bump rb-sys-env from 0.1.2 to 0.2.2 (#56)

Bumps [rb-sys-env](https://github.com/oxidize-rb/rb-sys) from 0.1.2 to 0.2.2.
- [Release notes](https://github.com/oxidize-rb/rb-sys/releases)
- [Commits](https://github.com/oxidize-rb/rb-sys/commits)

---
updated-dependencies:
- dependency-name: rb-sys-env
  dependency-version: 0.2.2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Cargo.lock

@@ -10,7 +10,7 @@ crate-type = ["cdylib"]
 rb-sys-env = "0.2"
 
 [dev-dependencies]
-rb-sys-env = { version = "0.1" }
+rb-sys-env = { version = "0.2" }
 rb-sys-test-helpers = { version = "0.2" }
 
 [dependencies]