fix: wait_with_output forget to close stdin

[dovahcrow]

No description provided.

[jonhoo]

This change is 

[NobodyXu]

Thank you!

[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.57%. Comparing base (bacc76d) to head (3d661a4).
Report is 19 commits behind head on master.

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Additional details and impacted files

Files with missing lines	Coverage Δ
src/child.rs	91.89% <100.00%> (+2.14%)	⬆️

... and 14 files with indirect coverage changes