Bump lxml from 4.7.1 to 4.8.0

Bumps [lxml](https://github.com/lxml/lxml) from 4.7.1 to 4.8.0.
- [Release notes](https://github.com/lxml/lxml/releases)
- [Changelog](https://github.com/lxml/lxml/blob/master/CHANGES.txt)
- [Commits](lxml/lxml@lxml-4.7.1...lxml-4.8.0)

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

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

requirements.txt

@@ -18,8 +18,8 @@ ethereum==2.3.2
 gnosis-py[django]==3.7.7
 gunicorn[gevent]==20.1.0
 hexbytes==0.2.2
-lxml==4.7.1
-numpy==1.22.1
+lxml==4.8.0
+numpy==1.22.3
 packaging==21.3
 psycogreen==1.0.2
 psycopg2-binary==2.9.3