log conditionally when not a zap.Logger

[reesmanp]

Looking to resolve #74 by being smart about which function to call on the interface instead of just defaulting to Error().

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 45.34%. Comparing base (7d7b817) to head (e6ea949).
Report is 11 commits behind head on master.

Files	Patch %	Lines
zap.go	0.00%	2 Missing and 1 partial ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##           master      #75      +/-   ##
==========================================
+ Coverage   40.00%   45.34%   +5.34%     
==========================================
  Files           1        1              
  Lines          90       86       -4     
==========================================
+ Hits           36       39       +3     
+ Misses         51       44       -7     
  Partials        3        3              

Flag	Coverage Δ
go-	45.34% <0.00%> (?)
go-1.19	45.34% <0.00%> (+5.34%)	⬆️
go-1.20	45.34% <0.00%> (?)
go-1.21	45.34% <0.00%> (?)
go-1.22	45.34% <0.00%> (?)
macos-latest	45.34% <0.00%> (?)
ubuntu-latest	45.34% <0.00%> (+5.34%)	⬆️

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