feat(#134): use setAttribute rather than doing a full re-render

[doug-wade]

No description provided.

[codecov]

Codecov Report

Attention: 11 lines in your changes are missing coverage. Please review.

Comparison is base (ef6d01c) 89.44% compared to head (b6dcf68) 89.15%.

Files	Patch %	Lines
packages/core/src/api/define-component.ts	83.78%	6 Missing ⚠️
packages/core/src/api/render.ts	95.58%	3 Missing ⚠️
packages/reactive/src/api/reactive.ts	94.87%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #551      +/-   ##
==========================================
- Coverage   89.44%   89.15%   -0.29%     
==========================================
  Files          42       45       +3     
  Lines         947     1097     +150     
  Branches      169      204      +35     
==========================================
+ Hits          847      978     +131     
- Misses        100      119      +19     

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