Bump mathru from 0.15.5 to 0.16.2

Bumps [mathru](https://gitlab.com/rustmath/mathru) from 0.15.5 to 0.16.2.
- [Changelog](https://gitlab.com/rustmath/mathru/blob/main/CHANGELOG.md)
- [Commits](https://gitlab.com/rustmath/mathru/commits/main)

---
updated-dependencies:
- dependency-name: mathru
  dependency-version: 0.16.2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Cargo.lock

@@ -37,7 +37,7 @@ thiserror = "2"
 light-curve-dmdt = { path = ".", features = ["full"] }
 approx = "0.5"
 criterion = "0.5"
-mathru = "0.15"
+mathru = "0.16"
 special = "0.11"
 static_assertions = "1.1"