Use black for formatting

Signed-off-by: Arjun Naik <arjun.rn@gmail.com>

.travis.yml

@@ -8,13 +8,13 @@ before_install:
   - if [ "$TRAVIS_OS_NAME" = "osx" ]; then sudo easy_install pip; fi
 language: python
 python:
-  - "3.4"
+  - "3.8"
 install:
   - pip install -r requirements.txt
   - pip install coveralls
-  - pip install flake8
+  - pip install black
 script:
   - python setup.py test
-  - python setup.py flake8
+  - black --check .
 after_success:
   - coveralls

piu/__init__.py

@@ -1 +1 @@
-__version__ = '0.14'
+__version__ = "0.14"

piu/__main__.py

@@ -1,4 +1,4 @@
 import piu.cli
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     piu.cli.main()