Bug/375 mocha esm

[DaveWelling]

What:

Bug 375 fix

Why:

Fixes problem with test cleanup when using esm and mocha

How:

Substitute resolution line in flush-microtasks.js

Checklist:

• Documentation updated
• Tests
• Ready to be merged
  
• Added myself to contributors table
  

[codecov]

Codecov Report

Merging #377 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master      #377   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            4         4           
  Lines           94        94           
  Branches        15        15           
=========================================
  Hits            94        94           

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[mpeyper]

Did you want to add yourself as a contributor in the readme? (See CONTRIBUTING.md for instructions)

[mpeyper]

I'll merge this now. Feel free to open another or with the a contribution acknowledgement if you want to.