corrected Timestamp format

src/main/java/de/anxietyprime/swajodel/JodelPost.java

@@ -18,7 +18,7 @@ public class JodelPost {
     // content of the post
     public String content;
     // date of the post
-    public Date date;
+    public Timestamp date;
     // location if the post
     public Location location;
     // list of all comments for the post
@@ -79,7 +79,7 @@ public class JodelPost {
         this.id = rs.getLong("id");
         this.title = rs.getString("title");
         this.content = rs.getString("content");
-        this.date = rs.getDate("postdate");
+        this.date = rs.getTimestamp("postdate");
         this.location = new Location(rs.getLong("longitude"), rs.getLong("latitude"));
         this.reactions = new Reactions(rs.getLong("positive"), rs.getLong("negative"));
     }