With the upgrade of node.js to version 16, the npm version will also change to version 8.
This fix is to support npm@8. npm@6 can also build without problems.

The modification method is different from other node modules.
The reason is due to the npm@8 issue.
https://github.com/npm/cli/issues/4027

Signed-off-by: Hirokazu MORIKAWA <morikw2@gmail.com>
(cherry picked from commit eee26dbac6)