Update thiserror requirement from 1.0.7 to 2.0.0

Updates the requirements on [thiserror](https://github.com/dtolnay/thiserror) to permit the latest version.
- [Release notes](https://github.com/dtolnay/thiserror/releases)
- [Commits](dtolnay/thiserror@1.0.7...2.0.0)

---
updated-dependencies:
- dependency-name: thiserror
  dependency-type: direct:production
...

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

Cargo.toml

@@ -16,7 +16,7 @@ regex = "1.4.2"
 RustyXML = "0.3.0"
 serde = { version = "1.0.118", features = ["derive"] }
 serde-xml-rs = "0.6.0"
-thiserror = "1.0.7"
+thiserror = "2.0.0"
 
 [dev-dependencies]
 assert_approx_eq = "1"