fix: import options deserialization (#218)

Author: katerina20

src/main/java/com/crowdin/client/sourcestrings/model/UploadStringsProgress.java

@@ -1,5 +1,7 @@
 package com.crowdin.client.sourcestrings.model;
 
+import com.crowdin.client.core.http.impl.json.EmptyArrayToNullDeserializer;
+import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import lombok.Data;
 
 import java.util.Date;
@@ -25,6 +27,7 @@ public static class Attributes {
         private String fileType;
         private Integer parserVersion;
         private List<Long> labelIds;
+        @JsonDeserialize(using = EmptyArrayToNullDeserializer.class)
         private ImportOptions importOptions;
     }
 }