fix: dist lost if multi-entry umd used in dev command

[PeachScript]

修复 umd 多 entry 的情况下，dev 构建只输出第一个 entry 产物的 bug

[codecov]

Codecov Report

Base: 94.67% // Head: 94.68% // Increases project coverage by +0.00% 🎉

Coverage data is based on head (125138b) compared to base (beabadb).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #590   +/-   ##
=======================================
  Coverage   94.67%   94.68%           
=======================================
  Files          51       51           
  Lines        1428     1429    +1     
  Branches      338      339    +1     
=======================================
+ Hits         1352     1353    +1     
- Misses         75       76    +1     
+ Partials        1        0    -1     

Impacted Files	Coverage Δ
src/builder/bundle/index.ts	100.00% <100.00%> (ø)
src/features/configPlugins/schema.ts	93.10% <0.00%> (ø)
src/builder/bundless/loaders/javascript/swc.ts	78.12% <0.00%> (ø)

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