Per pulumi/pulumi#1668. No code changes required, just package.json and lockfile updates.
In order to begin publishing our core SDK package to NPM, we will need it to be underneath the @pulumi scope so that it may remain private. Eventually, we can alias pulumi back to it. This is part of pulumi/pulumi#915.
This also adds lock files for some of our tests which we previously did not commit.
