fields[0].constructor === Array

[ghost]

"fields[0].constructor === Array" is not 100% reliable.
It should be replaced by a simple Array.isArray().

I'm using vue-api-query in a nuxt environment with SSR enabled.
The behavior is quite strange: "fields[0].constructor === Array" fails only in dev mode AND server side only.

Please merge, it makes me waste a lot of time :-(

[codecov]

Codecov Report

Merging #43 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master    #43   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           4      4           
  Lines         237    237           
  Branches       41     41           
=====================================
  Hits          237    237

Impacted Files	Coverage Δ
src/Builder.js	100% <100%> (ø)	⬆️

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