ci: add node-14.x to workflow

[erisu]

Motivation, Context & Description

• Test with Node 14.x
• Added Node 14.x CI all workflow configurations.

See apache/cordova#223 for more details.

Testing

• No local testing required.
• Use CI service test results

Checklist

• If this Pull Request resolves an issue, I linked to the issue in the text above (and used the correct keyword to close issues using keywords)

[codecov-io]

Codecov Report

Merging #108 (b4d0e90) into master (7dcbd29) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #108   +/-   ##
=======================================
  Coverage   39.34%   39.34%           
=======================================
  Files           5        5           
  Lines         427      427           
=======================================
  Hits          168      168           
  Misses        259      259           

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