www/node6: Update 6.14.2 -> 6.14.3

Update to the latest security release, fixing CVE-2018-7167.

https://nodejs.org/en/blog/release/v6.14.3/
https://nodejs.org/en/blog/vulnerability/june-2018-security-releases/

MFH: 2018Q2
Security: 45b8e2eb-7056-11e8-8fab-63ca6e0e13a2
Sponsored by: Miles AS