Update .travis.yml

Author: DomAmato

.travis.yml

@@ -9,18 +9,17 @@ matrix:
       python: 3.7
       name: 'lint'
       script: 
-        - pip install -r requirements.txt
+        - pip install .
         - pip install pylint
         - pylint -rn --errors-only ./Hologram
 
     - stage: test
       python: 3.7
-      name: 'test python 3'
+      name: 'test'
       script:      
         - pip install .
         - pip install coveralls
-        - rm -r tests/radius
-        - coverage run --source Hologram -m py.test
+        - coverage run --source Hologram -m pytest
         - coveralls
 
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