build(deps): bump libmozdata from 0.2.0 to 0.2.2 in /events (#1698)

Bumps [libmozdata](https://github.com/mozilla/libmozdata) from 0.2.0 to 0.2.2.
- [Release notes](https://github.com/mozilla/libmozdata/releases)
- [Commits](https://github.com/mozilla/libmozdata/compare/v0.2.0...v0.2.2)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

events/requirements.txt

@@ -2,7 +2,7 @@ aioamqp==0.15.0
 -e ../tools #egg=code-review-tools
 json-e==4.5.2
 jsonschema==4.17.3
-libmozdata==0.2.0
+libmozdata==0.2.2
 libmozevent==1.1.24
 python-hglib==2.6.2
 pytoml==0.1.21