Add Linux os check for setting some JSONDecoder options

Author: Frizlab

Sources/JSONLogger.swift

@@ -55,15 +55,20 @@ public struct JSONLogger : LogHandler {
 		encoder.dataEncodingStrategy = .base64
 		encoder.nonConformingFloatEncodingStrategy = .throw
 		let decoder = JSONDecoder()
+		/* #if os(Darwin) is not available on this version of the compiler. */
+#if !os(Linux)
 		if #available(macOS 12.0, tvOS 15.0, iOS 15.0, watchOS 8.0, *) {
 			decoder.allowsJSON5 = false
 		}
+#endif
 		decoder.keyDecodingStrategy = .useDefaultKeys
 		decoder.dateDecodingStrategy = .iso8601
 		decoder.dataDecodingStrategy = .base64
+#if !os(Linux)
 		if #available(macOS 12.0, tvOS 15.0, iOS 15.0, watchOS 8.0, *) {
 			decoder.assumesTopLevelDictionary = false
 		}
+#endif
 		decoder.nonConformingFloatDecodingStrategy = .throw
 		return (encoder, decoder)
 	}()