Updating node, eslint, and supporting dependencies

What does this MR do?

This MR updates eslint to the latest versions for its third-party dependencies. It also updates the base image because the latest version of eslint did not work with with the node 11 alpine image.

What are the relevant issue numbers?

gitlab-org/gitlab#215159 (closed)

Does this MR meet the acceptance criteria?

• Changelog entry added
• Documentation created/updated for GitLab EE, if necessary
• Documentation created/updated for this project, if necessary
• Documentation reviewed by technical writer or follow-up review issue created
• Tests added for this feature/bug
• Job definition updated, if necessary
  • Auto-DevOps template
  • Job definition example
  • CI Templates
• Conforms to the code review guidelines
• Conforms to the Go guidelines
• Security reports checked/validated by reviewer