chore(package): update uglify-js to version 2.8.13 (#627)
chore(package): update uglify-js to version 2.8.13 (#627)

https://greenkeeper.io/
gmist/my-gae-init,jakedotio/gae-init,gae-init/gae-init-babel,mdxs/gae-init,gae-init/gae-init,topless/gae-init,gmist/fix-5studio,vanessa-bell/hd-kiosk-v2,gmist/my-gae-init,gae-init/gae-init,gmist/five-studio2,lipis/github-stats,gae-init/gae-init,lipis/gae-init,lipis/gae-init,lipis/github-stats,gmist/my-gae-init,lipis/gae-init,gmist/ctm-5studio,gmist/ctm-5studio,lipis/gae-init,jakedotio/gae-init,gae-init/gae-init-upload,topless/gae-init,gmist/fix-5studio,gmist/ctm-5studio,gmist/five-studio2,gae-init/gae-init-babel,mdxs/gae-init,gae-init/gae-init-docs,gae-init/gae-init-upload,gae-init/gae-init-docs,gae-init/gae-init-upload,jakedotio/gae-init,gae-init/gae-init,gmist/five-studio2,topless/gae-init,gae-init/gae-init-babel,vanessa-bell/hd-kiosk-v2,jakedotio/gae-init,gae-init/gae-init-upload,mdxs/gae-init,lipis/github-stats,gae-init/gae-init-docs,gmist/five-studio2,gae-init/gae-init-docs,gmist/my-gae-init,lipis/github-stats,gmist/fix-5studio,gmist/fix-5studio,vanessa-bell/hd-kiosk-v2,gmist/ctm-5studio,vanessa-bell/hd-kiosk-v2,topless/gae-init,gae-init/gae-init-babel,mdxs/gae-init