Update dir-test requirement from 0.3 to 0.4

Updates the requirements on [dir-test](https://github.com/fe-lang/dir-test) to permit the latest version.
- [Release notes](https://github.com/fe-lang/dir-test/releases)
- [Commits](fe-lang/dir-test@v0.3.0...v0.4.0)

---
updated-dependencies:
- dependency-name: dir-test
  dependency-type: direct:production
...

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

crates/interpreter/Cargo.toml

@@ -20,6 +20,6 @@ sonatina-ir = { path = "../ir", version = "0.0.3-alpha" }
 
 [dev-dependencies]
 sonatina-parser = { path = "../parser" }
-dir-test = "0.3"
+dir-test = "0.4"
 regex = "1.11"
 once_cell = "1.20"

crates/parser/Cargo.toml

@@ -29,6 +29,6 @@ derive_more = { version = "=1.0.0", default-features = false, features = [
 smallvec = "1.13.2"
 
 [dev-dependencies]
-dir-test = "0.3"
+dir-test = "0.4"
 insta = { version = "1.41" }
 indenter = "0.3.3"