chore: Upgrade node version to v12.18

Created by: leoendless

Signed-off-by: leoliu leoliu@yunify.com

What type of PR is this?

/kind feature

What this PR does / why we need it:

Upgrade Node.js version to v12.18.3 to reach the requirement of the dependencies.

Which issue(s) this PR fixes:

Fixes #

Special notes for reviewers:

Additional documentation, usage docs, etc.: