Update code to PHP 7.4 syntax using rector

[koriym]

No description provided.

[codecov]

Codecov Report

Merging #165 (6ff5a5a) into 1.x (736947a) will not change coverage.
The diff coverage is n/a.

@@             Coverage Diff             @@
##                 1.x      #165   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
  Complexity        52        52           
===========================================
  Files             18        18           
  Lines            129       129           
===========================================
  Hits             129       129           

Impacted Files	Coverage Δ
src/Module/Constant/NamedModule.php	100.00% <ø> (ø)
src/Provide/Error/ThrowableHandler.php	100.00% <ø> (ø)
src/Provide/Error/VndError.php	100.00% <ø> (ø)
src/Provide/Router/WebRouter.php	100.00% <ø> (ø)
src/Provide/Transfer/HttpResponder.php	100.00% <ø> (ø)

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