fix: wait for all checkers to finish during build

[zsparal]

closes #38

[codecov-commenter]

Codecov Report

Merging #37 (05dde9f) into main (e1a0089) will increase coverage by 0.03%.
The diff coverage is 53.84%.

@@            Coverage Diff             @@
##             main      #37      +/-   ##
==========================================
+ Coverage   29.87%   29.91%   +0.03%     
==========================================
  Files          13       13              
  Lines         559      565       +6     
  Branches      114      115       +1     
==========================================
+ Hits          167      169       +2     
- Misses        392      396       +4     

Impacted Files	Coverage Δ
packages/vite-plugin-checker/src/main.ts	65.45% <53.84%> (-3.94%)	⬇️

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[fi3ework]

@Gustorn Good catch! Thank you! 🤩