Codecov Report

Merging #711 into master will increase coverage by 0.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #711      +/-   ##
==========================================
+ Coverage   98.06%   98.07%   +0.01%     
==========================================
  Files           6        6              
  Lines         155      156       +1     
==========================================
+ Hits          152      153       +1     
  Misses          3        3

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may i ask what the '...' additions mean (here and the line below)?

it extends you default configuration, you can use global mainFields https://webpack.js.org/configuration/resolve/#resolvemainfields, to avoid break logic we just extends them

does this change mean i can use the "style" field in package.json?

yes, you can use sass and/or style field in package.json