Do not serve hidden files or files in hidden folders

[ceeram]

Ignore hidden files and files in hidden folders within AssetMiddleware

[codecov-io]

Codecov Report

Merging #11100 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@             Coverage Diff              @@
##             master   #11100      +/-   ##
============================================
+ Coverage     94.88%   94.88%   +<.01%     
- Complexity    12838    12839       +1     
============================================
  Files           437      437              
  Lines         32736    32738       +2     
============================================
+ Hits          31061    31063       +2     
  Misses         1675     1675

Impacted Files	Coverage Δ	Complexity Δ
src/Routing/Middleware/AssetMiddleware.php	94.82% <100%> (+0.18%)	21 <0> (+1)	⬆️

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[inoas]

Thanks!