Travis workaround fix for pip install pep8 install fail

Example failure: https://travis-ci.org/swig/swig/jobs/273885223#L557 Error: IOError: [Errno 13] Permission denied: '/usr/local/lib/python2.7/dist-packages/pep8.pyc'
2017-09-11 08:16:57 +01:00 · 2017-09-11 08:16:57 +01:00 · f18b45e677
commit f18b45e677
parent 0646db73c3
1 changed files with 1 additions and 0 deletions
--- a/.travis.yml
+++ b/.travis.yml
@ -1,4 +1,5 @@
 language: cpp
+group: deprecated-2017Q3 # workaround for failing: pip install pep8
 matrix:
  include:
    - compiler: clang