chore(package.json): bump 0.19.1

chore(package.json): bump 0.19.0 (chimurai#294)

* chore(package.json): bump 0.19.0
* ci(travis): add node 9

chore(package.json): bump v0.18.0

chore(package.json): 0.17.4

chore(package.json): 0.17.3

chore(package.json): 0.17.2

chore(package): v0.17.1

chore(package): v0.17.0

chore(package): v0.16.0