release: 2.18.0

2025-05-19 task(C/I): lint [Jonas Eberle] (61d4815)
2025-05-19 feat(config): enable COA in inject() configuration [Jonas Eberle] (ac863a6)
2025-05-19 task(C/I): add tests for simple ContentObjects in inject() [Jonas Eberle] (0dbb43c)
2025-05-19 task(C/I): add a simple plain text test for inject() [Jonas Eberle] (3c971d3)
2025-05-19 task(C/I): use PHP8 attributes in phpunit tests [Jonas Eberle] (179d9d4)
2025-05-19 task(C/I): output deprecation warnings in phpunit [Jonas Eberle] (d4c66fd)
2025-04-24 task(local): add config/system/additional.php to make DDEV detect T3 [Jonas Eberle] (85fdc4b)
2025-04-24 task(C/I): simplify local/test domain [Jonas Eberle] (0a635df)