Fix wrong status code returning in case of handler with middleware.Timeout throws the panic

[Bl1tz23]

I found out that when the echo.HandlerFunc with middleware.Timeout calls panic, global middleware.Recover() could return a wrong status code to the client, cause inside echoHandlerFuncWrapper.ServeHTTP method the originalWriter wasn't restored if handler throws the panic.
This pull request must fix this issue.

[codecov]

Codecov Report

Merging #1864 (48fa624) into master (6430665) will increase coverage by 0.61%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1864      +/-   ##
==========================================
+ Coverage   89.57%   90.19%   +0.61%     
==========================================
  Files          31       31              
  Lines        2735     2765      +30     
==========================================
+ Hits         2450     2494      +44     
+ Misses        184      173      -11     
+ Partials      101       98       -3     

Impacted Files	Coverage Δ
middleware/timeout.go	100.00% <100.00%> (ø)
middleware/jwt.go	79.80% <0.00%> (+1.91%)	⬆️
middleware/static.go	70.00% <0.00%> (+2.83%)	⬆️
middleware/key_auth.go	96.55% <0.00%> (+29.88%)	⬆️

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