fix(remax): placeholderStyle 属性 diff 错误的问题

[noyobo]

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[codecov]

Codecov Report

Merging #1429 (c72100f) into master (9e39e68) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1429      +/-   ##
==========================================
- Coverage   90.75%   90.74%   -0.02%     
==========================================
  Files         363      363              
  Lines        4392     4386       -6     
  Branches      680      671       -9     
==========================================
- Hits         3986     3980       -6     
  Misses        398      398              
  Partials        8        8              

Impacted Files	Coverage Δ
...ges/remax-runtime/src/hostConfig/diffProperties.ts	100.00% <100.00%> (ø)

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