FIREBASE WARNING: Exception was thrown by user callback. TypeError: this.stream.clearLine is not a function
at ProgressBar.terminate (/home/travis/build/GoogleChrome/workbox-microsite/node_modules/progress/lib/node-progress.js:177:17)
at ProgressBar.tick (/home/travis/build/GoogleChrome/workbox-microsite/node_modules/progress/lib/node-progress.js:91:10)
at /home/travis/build/GoogleChrome/workbox-microsite/node_modules/firebase-tools/lib/deploy/hosting/deploy.js:65:17
at /home/travis/build/GoogleChrome/workbox-microsite/node_modules/firebase/lib/firebase-node.js:201:710
at ec (/home/travis/build/GoogleChrome/workbox-microsite/node_modules/firebase/lib/firebase-node.js:52:165)
at ac (/home/travis/build/GoogleChrome/workbox-microsite/node_modules/firebase/lib/firebase-node.js:31:216)
at bc (/home/travis/build/GoogleChrome/workbox-microsite/node_modules/firebase/lib/firebase-node.js:30:1259)
at Ji.h.Ib (/home/travis/build/GoogleChrome/workbox-microsite/node_modules/firebase/lib/firebase-node.js:220:287)
at Rh.h.Jd (/home/travis/build/GoogleChrome/workbox-microsite/node_modules/firebase/lib/firebase-node.js:186:283)
at Fh.Jd (/home/travis/build/GoogleChrome/workbox-microsite/node_modules/firebase/lib/firebase-node.js:176:364)
R: @gauntface
See https://stackoverflow.com/questions/44736576/travis-with-firebase-deploy-typeerror-this-stream-clearline-is-not-a-function
This should fix the ongoing Travis failures: