isolate cartopy dependency for pip installers

localdevices / pyorc

Surface velocity, object tracking, and river flow measurements in an open-source API

GNU Affero General Public License v3.0

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isolate cartopy dependency for pip installers #130

Closed hcwinsemius closed 1 year ago

hcwinsemius commented 1 year ago

cartopy is difficult to install. To prevent that installation does not work when cartopy cannot be installed, make this dependency optional and remove from setup.py