Switched to sequential pipenv install on travis

melinath · melinath · commit 8938ab18d74c · 2018-05-01T00:03:06.000-07:00
Workaround for pypa/pipenv#2088
diff --git a/.travis.yml b/.travis.yml
@@ -18,7 +18,7 @@ cache:
 install:
 - pip install pipenv
 - pipenv --version
-- pipenv sync
+- pipenv install --sequential
 - pipenv graph
 - python -m pipenv.help
 - psql --version
