build(npm): update lockfile format to v2

NPM v7, which is included with Node.js v16, uses version 2 of the
lockfile format. To avoid its complaints about the old lockfile version,
we're updating the lockfile. This change is backwards-compatible with
older versions of NPM.

Change-Id: I411ec29ea60ef9a616b99ddb52243fac2b305d28
Signed-off-by: Chris Kay <chris.kay@arm.com>
1 file changed