Ignore extra object keys in duration input

[xvaara]

Inputing a graphql (Postgraphile) interval object results in errors if asked for asMinutes() since the object contains all the keys that are inputed. This only allows keys that are in unitToMS.

Moment discards the extra keys.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (b5a1391) to head (5c5f103).
Report is 190 commits behind head on dev.

Additional details and impacted files

@@            Coverage Diff            @@
##               dev     #1519   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          179       179           
  Lines         1996      1996           
  Branches       507       508    +1     
=========================================
  Hits          1996      1996           

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[xvaara]

@iamkun any change getting this in a release?