Add Node.js 14 to build matrices

Description

We should test against Node.js 14 on Jenkins and appveyor.

Node.js 14 will become the active LTS on October 2020.

Environment

None

Pull Requests

None

Assignee

Unassigned

Reporter

Jorge Bay Gondra

Reviewer

None

Fix versions

None

Labels

None

Components

None

PM Priority

None

Pull Request

None

Priority

Major
Configure