ci(workflow): node 14 tests to use npm ^7.2

[erisu]

Platforms affected

n/a

Motivation and Context

One of the Node 14 tests is failing because of a change in a sub package that seems to have an effect with npm 6.

Description

Upgraded global npm to version ^7.2.

Testing

GitHub Actions

Checklist

• I've run the tests to see all new and existing tests pass
• I added automated test coverage as appropriate for this change
• Commit is prefixed with (platform) if this change only applies to one platform (e.g. (android))
• 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)
• I've updated the documentation if necessary

[codecov-commenter]

Codecov Report

Merging #101 (8f97c4f) into master (769727d) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #101   +/-   ##
=======================================
  Coverage   93.33%   93.33%           
=======================================
  Files           1        1           
  Lines          60       60           
=======================================
  Hits           56       56           
  Misses          4        4           

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