Use pip to install instead of setup.py, following python-jsonschema/jsonschema#449

Author: danielhers

.appveyor.yml

@@ -21,7 +21,7 @@ install:
   - conda create -q -n test-env python=3.6 cython numpy matplotlib networkx pypandoc pytest
   - activate test-env
   - cinst pandoc
-  - python setup.py install
+  - pip install .
   - python -m spacy download en_core_web_md
 
 build: off

.travis.yml

@@ -13,7 +13,7 @@ jobs:
   include:
   - env: TEST=unit
     install:
-    - python setup.py install
+    - pip install .
     - pip install pytest
     - pip install -r requirements.visualize.txt
     - python -m spacy download en_core_web_md