chore(package): update @types/node to version 12.6.4 (#345)
chore(package): update @types/node to version 12.6.4 (#345)

Co-authored-by: greenkeeper[bot] <4ad088495e6c26eca47e7c7548ed49b290f58d0d@users.noreply.github.com>
typestyle/typestyle,typestyle/typestyle,typestyle/typestyle