fix travis and install

.travis.yml

@@ -4,7 +4,8 @@ python:
   - "3.7"
   - "3.8"
 install:
-  - sudo apt-get install -qq python-gdal
+  - pip install conda
+  - conda install gdal
   - pip install -r requirements.txt
   - pip install pytest
 # command to run tests
@@ -17,8 +18,10 @@ jobs:
     - stage: coverage
       python: "3.8"
       install:
+        - pip install conda
+        - conda install gdal
         - pip install -r requirements.txt
         - pip install pytest pytest-cov coveralls
       script: pytest --cov=rivamap/
-      after_success: 
+      after_success:
         - coveralls

setup.py

@@ -19,5 +19,5 @@ def read(fname):
         'Topic :: Utilities',
         'Programming Language :: Python :: 2.7',
     ],
-    install_requires=['numpy', 'scipy', 'matplotlib'],
+    install_requires=['numpy', 'scipy', 'matplotlib', 'gdal'],
 )