Bump geoalchemy2 from 0.9.3 to 0.9.4 in /.depends (#242)

Bumps [geoalchemy2](https://github.com/geoalchemy/geoalchemy2) from 0.9.3 to 0.9.4.
- [Release notes](https://github.com/geoalchemy/geoalchemy2/releases)
- [Changelog](https://github.com/geoalchemy/geoalchemy2/blob/master/CHANGES.txt)
- [Commits](geoalchemy/geoalchemy2@0.9.3...0.9.4)

---
updated-dependencies:
- dependency-name: geoalchemy2
  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>

Author: dependabot[bot]

.depends/requirements.txt

@@ -58,7 +58,7 @@ feedparser==5.2.1
 Flask-Login==0.5.0
 flask>=1.0.3,<1.1.5
 GDAL==2.4.2
-GeoAlchemy2==0.9.3
+GeoAlchemy2==0.9.4
 geopandas==0.8.2
 gym>=0.15.6
 h5py