fix: still traverse children when metainfo doesnt return object

[pimlie]

Fixes: #468

[codecov]

Codecov Report

Merging #469 into master will increase coverage by 0.15%.
The diff coverage is 100%.

@@           Coverage Diff            @@
##           master   #469      +/-   ##
========================================
+ Coverage   99.84%   100%   +0.15%     
========================================
  Files          33     33              
  Lines         659    657       -2     
  Branches      198    198              
========================================
- Hits          658    657       -1     
+ Misses          1      0       -1

Impacted Files	Coverage Δ
src/shared/mixin.js	100% <ø> (+1.51%)	⬆️
src/shared/getComponentOption.js	100% <100%> (ø)	⬆️

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