⬆️ Update lxml requirement from <5.0,>=4.6.5 to >=4.6.5,<6.0

Updates the requirements on [lxml](https://github.com/lxml/lxml) to permit the latest version.
- [Release notes](https://github.com/lxml/lxml/releases)
- [Changelog](https://github.com/lxml/lxml/blob/master/CHANGES.txt)
- [Commits](lxml/lxml@lxml-4.6.5...lxml-5.3.0)

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

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

pyproject.toml

@@ -45,7 +45,7 @@ test = [
   "pytest-cov~=4.0",
   "syrupy~=3.0",
   "sphinxcontrib-plantuml~=0.0",
-  "lxml>=4.6.5,<5.0",
+  "lxml>=4.6.5,<6.0",
   "responses~=0.22.0",
   "pytest-xprocess~=0.22.2",
 ]