Update dependencies which contain vulnerabilities

What does this mr do?

As described in #258, we still have a couple of vulnerabilities in the Queue. The ones which are fixable are now fixed. There are some left over which are described in #258 and currently not fixable.

Actions taken to fix bug

Running dependency checker from gradle and upgrade the affected dependencies.

Does this MR meet the acceptance criteria?

• I have added a changelog entry to reflect the significant changes I made and the bug I fixed.
• A test was created to test the bug.
• I have updated the documentation accordingly.
• I adhere to the style guide.

src/main/java/nl/tudelft/ewi/queue/helper/CsvUserHelper.java

@@ -17,7 +17,6 @@ package nl.tudelft.ewi.queue.helper;
 
 import java.io.*;
 import java.util.ArrayList;
-import java.util.Scanner;
 
 import nl.tudelft.ewi.queue.model.DefaultRole;