Update travis script for swimm verify

.travis.yml

@@ -80,11 +80,10 @@ script:
 
 # verify swimm
 - cd $TRAVIS_BUILD_DIR
-- wget "https://github.com/swimmio/SwimmReleases/releases/download/v0.4.1-0/Swimm_0.4.1-0_Setup.deb" -O swimm
-- sudo dpkg -i swimm || (sudo apt-get update && sudo apt-get -f install)
-- chmod +x ./swimm
-- swimm --version
-- swimm verify
+- curl -s https://api.github.com/repos/swimmio/SwimmReleases/releases/latest | grep 'browser_download_url.*swimm-cli' | cut -d '"' -f 4 | wget -O swimm_cli -qi -
+- chmod +x swimm_cli
+- node swimm_cli --version
+- node swimm_cli verify
 
 after_success:
   # Upload code coverage results to codecov.io, see https://github.com/codecov/codecov-bash for more information