Wait for child

[RDruon]

Wait for child to avoid process ID exhaust, see https://doc.rust-lang.org/std/process/struct.Child.html#warning

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 6 lines in your changes missing coverage. Please review.

Project coverage is 91.66%. Comparing base (9633362) to head (a260bb0).
Report is 1 commits behind head on main.

Files	Patch %	Lines
lustrefs-exporter/src/main.rs	0.00%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #75      +/-   ##
==========================================
- Coverage   91.77%   91.66%   -0.11%     
==========================================
  Files          41       41              
  Lines        5201     5207       +6     
  Branches     5201     5207       +6     
==========================================
  Hits         4773     4773              
- Misses        391      397       +6     
  Partials       37       37              

Flag	Coverage Δ
2_14_0_ddn133	35.26% <ø> (ø)
2_14_0_ddn145	36.01% <ø> (ø)
all-tests	91.66% <0.00%> (-0.11%)	⬇️

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[github-actions]

Benchmark for 2eb784e

Click to view benchmark

Test	Base	PR	%
jobstats 100	4.0±0.56ms	4.3±0.83ms	+7.50%
jobstats 1000	39.6±4.97ms	41.0±7.33ms	+3.54%

[jgrund]

I think we need to await both the response and the child at the same time.

[github-actions]

Benchmark for 594e422

Click to view benchmark

Test	Base	PR	%
jobstats 100	4.2±0.64ms	4.1±0.63ms	-2.38%
jobstats 1000	42.6±5.78ms	39.1±5.19ms	-8.22%