Bump libloading from 0.7.1 to 0.7.2 (#81)

Bumps [libloading](https://github.com/nagisa/rust_libloading) from 0.7.1 to 0.7.2.
- [Release notes](https://github.com/nagisa/rust_libloading/releases)
- [Commits](https://github.com/nagisa/rust_libloading/commits)

---
updated-dependencies:
- dependency-name: libloading
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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