Installing libgdal for testing

.gitlab-ci.yml

@@ -10,6 +10,8 @@ test:
   image: python:3.8-slim
   stage: test
   script:
+    - apt-get update
+    - apt-get install libgdal-dev
     - python3 setup.py install
     - pip3 install -r requirements-test.txt
     - pip3 install -r requirements-dev.txt