Add condition for when no defaults at all are defined

[elinw]

No description provided.

[codecov-io]

Codecov Report

Merging #503 into develop will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           develop    #503   +/-   ##
=======================================
  Coverage     96.3%   96.3%           
=======================================
  Files           12      12           
  Lines          541     541           
=======================================
  Hits           521     521           
  Misses          20      20

Impacted Files	Coverage Δ
R/skim_with.R	100% <100%> (ø)	⬆️

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[michaelquinn32]

Really good idea! Thanks!