Added 'pack' to npm lifecycle
Added 'pack' to npm lifecycle

`npm pack` is a lifecycle command not publicly documented. This
adds it to the lifecycle command list so that it will be
executed as `npm pack` rather than `npm run pack`.

Change-Id: Ifaa2c128f1d1c9e098612074c6541a959534d838

openstack-infra/project-config,Tesora/tesora-project-config,Tesora/tesora-project-config,dongwenjuan/project-config,dongwenjuan/project-config,noorul/os-project-config,noorul/os-project-config,openstack-infra/project-config