Bump GeoTools 20.2 -> 20.3
Bump GeoTools 20.2 -> 20.3

release notes:
- https://geotoolsnews.blogspot.com/2019/03/geotools-203-released.html
- https://osgeo-org.atlassian.net/secure/ReleaseNote.jspa?projectId=10001&version=16747

B3Partners/flamingo,flamingo-geocms/flamingo,B3Partners/flamingo,flamingo-geocms/flamingo,B3Partners/flamingo,B3Partners/flamingo,flamingo-geocms/flamingo,flamingo-geocms/flamingo