End support for PHP 7.2

[whikloj]

Due to changes to phpunit and phpcpd, running PHP 7.2 causes trouble.

It also has an EOL date of Oct 1, 2020 which in less than 3 months.

This removes testing of PHP 7.2 but other than changes to the testing framework the actual code should still be compatible.

This will be mark the start of the 3.0 version

[codecov[bot]]

Codecov Report

Merging #28 (e766f51) into main (150c777) will increase coverage by 1.04%. The diff coverage is n/a.

@@             Coverage Diff              @@
##               main      #28      +/-   ##
============================================
+ Coverage     81.16%   82.21%   +1.04%     
  Complexity      483      483              
============================================
  Files             7        7              
  Lines          1285     1282       -3     
============================================
+ Hits           1043     1054      +11     
+ Misses          242      228      -14     

Impacted Files	Coverage Δ
src/Bag.php	78.95% <0.00%> (-0.09%)	:arrow_down:
src/Fetch.php	88.54% <0.00%> (+6.16%)	:arrow_up:

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[collectiveaccess]

PHP 7.2 was eol'ed last November, so it's all good :-)

[whikloj]

🤦 the days are sooooo long. Thanks @collectiveaccess you are correct.