Update code

[jawira]

I ran Rector to update code to PHP 7.3 I only committed changes that can be easily reviewed.

[codecov[bot]]

Codecov Report

Merging #1684 (a17faec) into main (0025c28) will increase coverage by 0.00%. The diff coverage is 48.00%.

:exclamation: Current head a17faec differs from pull request most recent head 1d4ebdb. Consider uploading reports for the commit 1d4ebdb to get more accurate results

@@            Coverage Diff            @@
##               main    #1684   +/-   ##
=========================================
  Coverage     58.34%   58.35%           
+ Complexity     6961     6959    -2     
=========================================
  Files           355      355           
  Lines         16611    16615    +4     
=========================================
+ Hits           9692     9695    +3     
- Misses         6919     6920    +1     

Impacted Files	Coverage Δ
src/Phing/Filter/XincludeFilter.php	0.00% <0.00%> (ø)
src/Phing/Filter/XsltFilter.php	0.00% <0.00%> (ø)
src/Phing/Io/FileSystem.php	47.31% <0.00%> (+0.33%)	:arrow_up:
src/Phing/Listener/MailLogger.php	0.00% <0.00%> (ø)
src/Phing/Phing.php	27.97% <0.00%> (ø)
src/Phing/Task/Optional/FileSyncTask.php	16.80% <0.00%> (-0.14%)	:arrow_down:
src/Phing/Task/Optional/HipchatTask.php	0.00% <0.00%> (ø)
src/Phing/Task/Optional/MailTask.php	0.00% <0.00%> (ø)
src/Phing/Task/Optional/ParallelTask.php	0.00% <0.00%> (ø)
src/Phing/Task/System/JsonValidateTask.php	0.00% <0.00%> (ø)
... and 10 more

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