Travis version of pip is too old (#4180)

* Travis version of pip is too old

* Also need to upgrade setuptools

.travis.yml

@@ -82,6 +82,8 @@ before_install:
 
 # Install various dependencies
 install:
+  - pip install --upgrade pip
+  - pip install --upgrade setuptools
   - pip install --upgrade codecov
   - pip install --upgrade flake8
   - pip install --upgrade sphinx