Bump mgrs from 1.3.5 to 1.3.6

Bumps [mgrs](https://github.com/hobu/mgrs) from 1.3.5 to 1.3.6.
- [Release notes](https://github.com/hobu/mgrs/releases)
- [Commits](https://github.com/hobu/mgrs/commits)

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

setup.py

@@ -46,7 +46,7 @@ setup(
         'shapely==1.7.0',
         'ogn-client==0.9.6',
         'psycopg2-binary==2.8.4',
-        'mgrs==1.3.5',
+        'mgrs==1.3.6',
         'xmlunittest==0.5.0',
         'flower==0.9.3',
         'tqdm==4.42.0',