Pylint for all versions

.travis.yml

@@ -4,6 +4,13 @@ python:
   - "3.4"
   - "3.5"
   - "3.6"
+# Workaround for testing Python 3.7:
+# https://github.com/travis-ci/travis-ci/issues/9815
+matrix:  
+  include:
+    - python: 3.7
+      dist: xenial
+      sudo: yes
 before_install:
   - pip install --upgrade setuptools pip
   - pip install --upgrade pylint pytest pytest-pylint pytest-runner
@@ -14,4 +21,4 @@ script:
   - python -m pytest  # Run the tests without IPython.
   - pip install ipython
   - python -m pytest  # Now run the tests with IPython.
-  - if [[ $TRAVIS_PYTHON_VERSION != 3.6 ]]; then pylint fire --ignore=test_components_py3.py,parser_fuzz_test.py,console; fi
+  - pylint fire --ignore=test_components_py3.py,parser_fuzz_test.py,console