perf(ui/spaces): add class

[ahqrt]

Checklist

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• Fix linting errors
• Tests have been added / updated (or snapshots)

Change information

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[github-actions]

[codecov-commenter]

Codecov Report

Merging #374 (e70ee5e) into dev (ba68dc9) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##              dev     #374   +/-   ##
=======================================
  Coverage   96.39%   96.39%           
=======================================
  Files         209      209           
  Lines        4907     4907           
  Branches     1047     1046    -1     
=======================================
  Hits         4730     4730           
  Misses        177      177           

Impacted Files	Coverage Δ
packages/varlet-ui/src/space/Space.tsx	95.91% <100.00%> (ø)

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