Added Middleware Exception

[rajjanorkar]

Currently there is no way to catch middleware exception on server serve function. This will help if someone creating custom middleware and want to hook it up in the main functionality.

[codecov]

Codecov Report

Merging #425 (5877dbb) into main (73b7caf) will decrease coverage by 0.20%.
The diff coverage is 33.33%.

@@             Coverage Diff              @@
##               main     #425      +/-   ##
============================================
- Coverage     99.60%   99.40%   -0.20%     
- Complexity      367      368       +1     
============================================
  Files            20       20              
  Lines          1010     1012       +2     
============================================
  Hits           1006     1006              
- Misses            4        6       +2     

Impacted Files	Coverage Δ
src/Tus/Server.php	99.30% <33.33%> (-0.70%)	⬇️

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