Re-license under GPLv2

[DeepDiver1975]

Release as GPL2

[codecov]

Codecov Report

Merging #57 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master      #57   +/-   ##
=========================================
  Coverage     62.75%   62.75%           
  Complexity      114      114           
=========================================
  Files            11       11           
  Lines           400      400           
=========================================
  Hits            251      251           
  Misses          149      149

Impacted Files	Coverage Δ	Complexity Δ
lib/EventHandler.php	100% <ø> (ø)	5 <0> (ø)	⬇️
lib/LoginPageBehaviour.php	100% <ø> (ø)	5 <0> (ø)	⬇️
lib/OpenIdConnectAuthModule.php	87.83% <ø> (ø)	23 <0> (ø)	⬇️
lib/Sabre/OpenIdSabreAuthPlugin.php	0% <ø> (ø)	10 <0> (ø)	⬇️
lib/Service/UserLookupService.php	100% <ø> (ø)	9 <0> (ø)	⬇️
appinfo/routes.php	0% <ø> (ø)	0 <0> (ø)	⬇️
lib/Logger.php	100% <ø> (ø)	11 <0> (ø)	⬇️
lib/Application.php	0% <ø> (ø)	19 <0> (ø)	⬇️
lib/Client.php	92.59% <ø> (ø)	8 <0> (ø)	⬇️
appinfo/app.php	0% <ø> (ø)	0 <0> (ø)	⬇️
... and 1 more

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