Check PHP 8.0 compatibility

[nickvergessen]

#225

[codecov]

Codecov Report

Merging #232 (edec90f) into master (27f51b8) will increase coverage by 0.73%.
The diff coverage is 100.00%.

❗ Current head edec90f differs from pull request most recent head ebfe62b. Consider uploading reports for the commit ebfe62b to get more accurate results

@@             Coverage Diff              @@
##             master     #232      +/-   ##
============================================
+ Coverage     83.78%   84.51%   +0.73%     
+ Complexity      328      321       -7     
============================================
  Files            30       30              
  Lines           925      917       -8     
============================================
  Hits            775      775              
+ Misses          150      142       -8     

Flag	Coverage Δ	Complexity Δ
php	84.51% <100.00%> (+0.73%)	321.00 <11.00> (-7.00)	⬆️

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Impacted Files	Coverage Δ	Complexity Δ
lib/Connector/Sabre/RedirectRequestPlugin.php	57.30% <100.00%> (ø)	34.00 <0.00> (ø)
lib/Db/LockMapper.php	100.00% <100.00%> (ø)	5.00 <3.00> (-2.00)
lib/MetaDataStorage.php	91.66% <100.00%> (ø)	39.00 <0.00> (-1.00)
lib/RollbackService.php	96.87% <100.00%> (ø)	9.00 <8.00> (-1.00)
lib/AppInfo/Application.php	0.00% <0.00%> (ø)	6.00% <0.00%> (ø%)
lib/Migration/Version1005Date20200312102456.php	0.00% <0.00%> (ø)	2.00% <0.00%> (ø%)

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[nickvergessen]

/backport to stable21

[backportbot-nextcloud]

The backport to stable21 failed. Please do this backport manually.