wercker: add bump-up npm step (see: https://github.com/npm/npm/issues/7366)
wercker: add bump-up npm step (see: https://github.com/npm/npm/issues/7366)

mertaytore/koding,koding/koding,koding/koding,kwagdy/koding-1,kwagdy/koding-1,gokmen/koding,cihangir/koding,cihangir/koding,jack89129/koding,gokmen/koding,szkl/koding,andrewjcasal/koding,acbodine/koding,alex-ionochkin/koding,gokmen/koding,drewsetski/koding,jack89129/koding,szkl/koding,sinan/koding,mertaytore/koding,mertaytore/koding,andrewjcasal/koding,szkl/koding,drewsetski/koding,andrewjcasal/koding,koding/koding,koding/koding,jack89129/koding,szkl/koding,andrewjcasal/koding,alex-ionochkin/koding,alex-ionochkin/koding,usirin/koding,kwagdy/koding-1,sinan/koding,szkl/koding,jack89129/koding,usirin/koding,alex-ionochkin/koding,cihangir/koding,kwagdy/koding-1,jack89129/koding,acbodine/koding,gokmen/koding,usirin/koding,koding/koding,alex-ionochkin/koding,rjeczalik/koding,acbodine/koding,drewsetski/koding,acbodine/koding,mertaytore/koding,rjeczalik/koding,kwagdy/koding-1,drewsetski/koding,usirin/koding,sinan/koding,alex-ionochkin/koding,alex-ionochkin/koding,acbodine/koding,rjeczalik/koding,gokmen/koding,mertaytore/koding,cihangir/koding,andrewjcasal/koding,gokmen/koding,jack89129/koding,usirin/koding,gokmen/koding,drewsetski/koding,cihangir/koding,szkl/koding,sinan/koding,jack89129/koding,acbodine/koding,alex-ionochkin/koding,acbodine/koding,andrewjcasal/koding,rjeczalik/koding,drewsetski/koding,drewsetski/koding,usirin/koding,usirin/koding,acbodine/koding,rjeczalik/koding,szkl/koding,sinan/koding,andrewjcasal/koding,gokmen/koding,rjeczalik/koding,usirin/koding,koding/koding,mertaytore/koding,sinan/koding,kwagdy/koding-1,rjeczalik/koding,koding/koding,sinan/koding,kwagdy/koding-1,koding/koding,drewsetski/koding,jack89129/koding,cihangir/koding,sinan/koding,rjeczalik/koding,cihangir/koding,szkl/koding,andrewjcasal/koding,mertaytore/koding,cihangir/koding,kwagdy/koding-1,mertaytore/koding