8 - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test ; fi
9 - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then sudo apt-get -qq update ; fi
10 - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then sudo apt-get -qq install g++-4.8 ; fi
11 - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then export CXX=g++-4.8 ; fi
12 - npm install -g npm@5.1.0
19 script: npm run $NPM_COMMAND
20 after_success: npm run coveralls