Bump url from 2.5.4 to 2.5.6 (#118)

Bumps [url](https://github.com/servo/rust-url) from 2.5.4 to 2.5.6.
- [Release notes](https://github.com/servo/rust-url/releases)
- [Commits](https://github.com/servo/rust-url/commits)

---
updated-dependencies:
- dependency-name: url
  dependency-version: 2.5.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]