Allow PHP 8

[phansys]

No description provided.

[codecov]

Codecov Report

Merging #33 (8927457) into master (809a465) will decrease coverage by 0.44%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master      #33      +/-   ##
============================================
- Coverage     15.70%   15.25%   -0.45%     
  Complexity      129      129              
============================================
  Files            15       15              
  Lines           242      236       -6     
============================================
- Hits             38       36       -2     
+ Misses          204      200       -4     

Impacted Files	Coverage Δ
src/Client.php	12.06% <0.00%> (-2.00%)	⬇️

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