Stop testing PHP 7.4, 8.0 and Drupal 9

[mglaman]

Stop testing PHP 7.4, 8.0 and Drupal 9

[andypost]

PHP 8.1 is only supported next 1.5 years
D9 surely needs phase out

[markdorison]

This makes sense to me. 👍🏻

[mglaman]

PHP bumped to 8.1. Technically D9 can be supported, if it was removed the following tests/rules could be dropped:

• AccessDeprecatedConstantTest, and probably \mglaman\PHPStanDrupal\Rules\Deprecations\AccessDeprecatedConstant
• \mglaman\PHPStanDrupal\Tests\Rules\ClassExtendsInternalClassRuleTest::testRule ContentEntityDeleteForm test case
• ConditionManagerCreateInstanceContextConfigurationRuleTest (and probably its rule)
• \mglaman\PHPStanDrupal\Tests\Rules\DeprecatedHookImplementationTest::testRule test for deprecated_field_widget_hooks_field_widget_form_alter
• \mglaman\PHPStanDrupal\Tests\Rules\GetDeprecatedServiceRuleTest::testRuleDrupal8
• \mglaman\PHPStanDrupal\Tests\Rules\GetDeprecatedServiceRuleTest::testRuleDrupal9
• \mglaman\PHPStanDrupal\Tests\Rules\RequestStackGetMainRequestRuleTest::testRule and the rule
• \mglaman\PHPStanDrupal\Tests\Rules\SymfonyCmfRouteObjectInterfaceConstantsRuleTest::testRule and the rule
• \mglaman\PHPStanDrupal\Tests\Rules\SymfonyCmfRoutingInClassMethodSignatureRuleTest::testRule and the rule

[alexb7217]

Personally, I have no need for Drupal 9 support. Generally, favoring accelerated + efficient development over legacy maintenance seems like a good idea.