refactor: use spread syntax for plugin push

[manniL]

Types of changes

• Refactor

Checklist:

• All new and existing tests are passing.

[codecov-io]

Codecov Report

Merging #4976 into dev will increase coverage by 0.04%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##              dev    #4976      +/-   ##
==========================================
+ Coverage   92.28%   92.32%   +0.04%     
==========================================
  Files          74       74              
  Lines        2450     2450              
  Branches      603      603              
==========================================
+ Hits         2261     2262       +1     
+ Misses        169      168       -1     
  Partials       20       20

Impacted Files	Coverage Δ
packages/webpack/src/config/base.js	95.45% <100%> (ø)	⬆️
packages/vue-renderer/src/renderer.js	95.1% <0%> (+0.54%)	⬆️

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