minor change in ci config

2 jobs for impelemtation_preprocessing in 1 minute and 51 seconds
Name Stage Failure
failed
linter Test
Collecting entrypoints<0.4.0,>=0.3.0
Downloading entrypoints-0.3-py2.py3-none-any.whl (11 kB)
Collecting pyflakes<2.2.0,>=2.1.0
Downloading pyflakes-2.1.1-py2.py3-none-any.whl (59 kB)
Installing collected packages: pycodestyle, mccabe, entrypoints, pyflakes, flake8
Successfully installed entrypoints-0.3 flake8-3.7.9 mccabe-0.6.1 pycodestyle-2.5.0 pyflakes-2.1.1
$ flake8 ./umami
./umami/tests/test_preprocessing_tools.py:216:1: W293 blank line contains whitespace
ERROR: Job failed: exit code 1