Bump zopfli from 0.2.1 to 0.2.2

Bumps [zopfli](https://github.com/fonttools/py-zopfli) from 0.2.1 to 0.2.2.
- [Release notes](https://github.com/fonttools/py-zopfli/releases)
- [Commits](fonttools/py-zopfli@v0.2.1...v0.2.2)

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

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -27,4 +27,4 @@ typed-ast>=1.4.2
 ufonormalizer==0.6.1
 ufoProcessor==1.9.0
 unicodedata2==14.0.0
-zopfli==0.2.1
+zopfli==0.2.2