feat: add Dubnium LTS tag to 10.x, mark 11.x as latest
feat: add Dubnium LTS tag to 10.x, mark 11.x as latest

- https://nodejs.org/en/blog/release/v10.13.0/
- https://nodejs.org/en/blog/release/v11.0.0/

joyent/docker-node,nodejs/docker-node,chorrell/docker-node,nodejs/docker-node,pesho/docker-node,chorrell/docker-node