Recursive imports processing

[msimulcik]

This PR adds recursive imports processing which allows imported files to import other files. It solves #35

[codecov]

Codecov Report

Merging #42 into master will increase coverage by 0.69%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #42      +/-   ##
==========================================
+ Coverage   92.85%   93.54%   +0.69%     
==========================================
  Files           4        4              
  Lines          28       31       +3     
  Branches        3        4       +1     
==========================================
+ Hits           26       29       +3     
  Misses          1        1              
  Partials        1        1

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

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[evenchange4]

Thanks! Released v1.1.0 with your changes.