fix: #240 rollup warning

[ShaofeiZi]

先加个默认 关闭这个警告。。 建议可以把这个参数放出来。

[codecov[bot]]

Codecov Report

Merging #317 (469c430) into master (2d5b549) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #317   +/-   ##
=======================================
  Coverage   73.72%   73.72%           
=======================================
  Files          16       16           
  Lines         472      472           
  Branches      171      171           
=======================================
  Hits          348      348           
  Misses        123      123           
  Partials        1        1           

Impacted Files	Coverage Δ
packages/father-build/src/getRollupConfig.ts	97.72% <ø> (ø)

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