Update spread props in each blocks

[Rich-Harris]

Fixes #1337

[codecov-io]

Codecov Report

Merging #1357 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #1357      +/-   ##
==========================================
+ Coverage   91.53%   91.53%   +<.01%     
==========================================
  Files         127      127              
  Lines        4464     4466       +2     
  Branches     1381     1382       +1     
==========================================
+ Hits         4086     4088       +2     
  Misses        153      153              
  Partials      225      225

Impacted Files	Coverage Δ
src/utils/flattenReference.ts	76.92% <ø> (ø)	⬆️
src/generators/nodes/Element.ts	94.66% <100%> (+0.03%)	⬆️
src/generators/nodes/Component.ts	97.42% <100%> (ø)	⬆️

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