Add PHP 8.4 support to Smarty #541

Job	Run time
Tests (ubuntu-latest, 7.2, default)	1m 22s
Tests (ubuntu-latest, 7.3, default)	1m 16s
Tests (ubuntu-latest, 7.4, default)	1m 15s
Tests (ubuntu-latest, 8.0, default)	1m 14s
Tests (ubuntu-latest, 8.1, default)	1m 16s
Tests (ubuntu-latest, 8.2, default)	1m 15s
Tests (ubuntu-latest, 8.3, default)	1m 21s
Tests (ubuntu-latest, 8.4, default)	1m 26s
Tests (windows-latest, 7.2, default)	1m 44s
Tests (windows-latest, 7.3, default)	1m 44s
Tests (windows-latest, 7.4, default)	1m 40s
Tests (windows-latest, 8.0, default)	1m 37s
Tests (windows-latest, 8.1, default)	1m 40s
Tests (windows-latest, 8.2, default)	5h 59m 59s
Tests (windows-latest, 8.3, default)	1m 40s
Tests (windows-latest, 8.4, default)	1m 40s
Tests (ubuntu-latest, 8.0, jit)	1m 21s
Tests (ubuntu-latest, 8.1, jit)	1m 22s
Tests (ubuntu-latest, 8.2, jit)	1m 17s
Tests (ubuntu-latest, 8.3, jit)	1m 16s
Tests (ubuntu-latest, 8.4, jit)	1m 23s
	6h 28m 48s

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