added chromedriver to path on travis

Author: mwwsp

.travis.yml

@@ -21,6 +21,7 @@ jobs:
         chrome: stable
       env: TOXENV=py36 MOZ_HEADLESS=1 GECKODRIVER=0.22.0
       before_install:
+        - export PATH=/tmp/google-chrome-stable:$PATH
         - wget -O /tmp/geckodriver.tar.gz https://github.com/mozilla/geckodriver/releases/download/v$GECKODRIVER/geckodriver-v$GECKODRIVER-linux64.tar.gz
         - mkdir $HOME/geckodriver && tar xvf /tmp/geckodriver.tar.gz -C $HOME/geckodriver
         - export PATH=$HOME/geckodriver:$PATH