Use yarn instead of npm

scripts/deploy-apps.sh

@@ -10,7 +10,7 @@ echo "Setting up each aragon app in ./apps"
 echo "a new app version will be deployed"
 echo "----"
 
-./scripts/every-app.sh "npm install"
+./scripts/every-app.sh "yarn install"
 ./scripts/every-app.sh "aragon apm publish major"
 
 echo "Done, new versions of all apps deployed"