Safari 18.2 updates (#406)

https://developer.apple.com/documentation/safari-release-notes/safari-18_2-release-notes

features.json

@@ -221,18 +221,18 @@
 				"exceptionsFinal": ["flag", "Supported in Safari Technology Preview 205"],
 				"exceptions": "15.2",
 				"extendedConst": "17.4",
-				"gc": ["flag", "Supported in Safari Technology Preview 202"],
+				"gc": "18.2",
 				"multiValue": "13.1",
 				"mutableGlobals": "12",
 				"referenceTypes": "15",
 				"relaxedSimd": ["flag", "Requires JavaScriptCore flag `useWebAssemblyRelaxedSIMD`"],
 				"saturatedFloatToInt": "15",
 				"signExtensions": ["14.1", "Supported in desktop Safari since 14.1 and iOS Safari since 14.5"],
 				"simd": "16.4",
-				"tailCall": ["flag", "Supported in Safari Technology Preview 202"],
+				"tailCall": "18.2",
 				"threads": ["14.1", "Supported in desktop Safari since 14.1 and iOS Safari since 14.5"],
 				"typedFunctionReferences": "18",
-				"typeReflection": ["flag", "Supported in Safari Technology Preview 202, only supports `WebAssembly.Module.imports` and `WebAssembly.Module.exports`"],
+				"typeReflection": ["flag", "Supported in Safari 18.2, only supports `WebAssembly.Module.imports` and `WebAssembly.Module.exports`"],
 				"webContentSecurityPolicy": "16"
 			}
 		},