add travis deploy on master branch (#39)

.travis.yml

@@ -1,20 +1,26 @@
 language: python
 sudo: false
 python:
-  - "2.7"
-  - "3.5"
-  - "3.6"
-# Enable 3.7 without globally enabling sudo and dist: xenial for other build jobs
+- '2.7'
+- '3.5'
+- '3.6'
 matrix:
   include:
-    - python: 3.7
-      dist: xenial
-      sudo: true
+  - python: 3.7
+    dist: xenial
+    sudo: true
 before_install:
-  - pip install -U pip
+- pip install -U pip
 install:
-  - python setup.py install
-  - pip install -r requirements_dev.txt
-  - git diff --name-only $TRAVIS_COMMIT_RANGE | xargs pre-commit run --files
+- python setup.py install
+- pip install -r requirements_dev.txt
+- git diff --name-only $TRAVIS_COMMIT_RANGE | xargs pre-commit run --files
 script:
-  - tox
+- tox
+deploy:
+  on:
+    branch: master
+  provider: pypi
+  user: __token__
+  password:
+    secure: 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