Bump geoalchemy2 from 0.8.4 to 0.9.0 (#207)

Bumps [geoalchemy2](https://github.com/geoalchemy/geoalchemy2) from 0.8.4 to 0.9.0.
- [Release notes](https://github.com/geoalchemy/geoalchemy2/releases)
- [Changelog](https://github.com/geoalchemy/geoalchemy2/blob/master/CHANGES.txt)
- [Commits](https://github.com/geoalchemy/geoalchemy2/compare/0.8.4...0.9.0)

---
updated-dependencies:
- dependency-name: geoalchemy2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

setup.py

@@ -47,7 +47,7 @@ setup(
         'Flask-Redis==0.4.0',
         'redis==3.5.3',
         'aerofiles==1.0.0',
-        'geoalchemy2==0.8.4',
+        'geoalchemy2==0.9.0',
         'shapely==1.7.1',
         'ogn-client==1.2.1',
         'mgrs==1.4.0',