Updated to use napi prebuilds.
Updated to use napi prebuilds.

Change-Id: I24a5332b6c1046de7d7f444858f0b2ca28b8e4b3
Reviewed-on: https://review.couchbase.org/c/couchnode/+/178495
Reviewed-by: Charles Dixon <e13bf4498b4994e133fd3586350658dc4a59329a@gmail.com>
Tested-by: Brett Lawson <c8c4369773d7d7226e031f0c4af62e3f38a08510@gmail.com>

couchbase/couchnode,couchbase/couchnode,couchbase/couchnode,couchbase/couchnode