Bump tinycss2 from 1.1.1 to 1.2.1

Bumps [tinycss2](https://github.com/Kozea/tinycss2) from 1.1.1 to 1.2.1.
- [Release notes](https://github.com/Kozea/tinycss2/releases)
- [Changelog](https://github.com/Kozea/tinycss2/blob/master/docs/changelog.rst)
- [Commits](Kozea/tinycss2@v1.1.1...v1.2.1)

---
updated-dependencies:
- dependency-name: tinycss2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

requirements.txt

@@ -307,7 +307,7 @@ sqlparse==0.4.2
     #   django-debug-toolbar
 tif2geojson==0.1.3
     # via geotrek (setup.py)
-tinycss2==1.1.1
+tinycss2==1.2.1
     # via
     #   cairosvg
     #   cssselect2