Update node.js to 12.16.1
This bumps the versions to latest LTS version, changelogs:
https://github.com/nodejs/node/blob/master/doc/changelogs/CHANGELOG_V12.md#12.13.0
https://github.com/nodejs/node/blob/master/doc/changelogs/CHANGELOG_V12.md#12.13.1
https://github.com/nodejs/node/blob/master/doc/changelogs/CHANGELOG_V12.md#12.14.0
https://github.com/nodejs/node/blob/master/doc/changelogs/CHANGELOG_V12.md#12.14.1
https://github.com/nodejs/node/blob/master/doc/changelogs/CHANGELOG_V12.md#12.15.0
https://github.com/nodejs/node/blob/master/doc/changelogs/CHANGELOG_V12.md#12.16.0
https://github.com/nodejs/node/blob/master/doc/changelogs/CHANGELOG_V12.md#12.16.1
Change-Id: Ie395a9e5a8c2e22d22a1b08f4fc258f6e5fa4494
Signed-off-by: Robert Varga <robert.varga@pantheon.tech>