A couple more dependency updates.

Author: DavidWhitlock

grader/pom.xml

@@ -39,12 +39,12 @@
     <dependency>
       <groupId>com.opencsv</groupId>
       <artifactId>opencsv</artifactId>
-      <version>5.10</version>
+      <version>5.12.0</version>
     </dependency>
     <dependency>
       <groupId>ch.qos.logback</groupId>
       <artifactId>logback-classic</artifactId>
-      <version>1.5.21</version>
+      <version>1.5.23</version>
     </dependency>
     <dependency>
       <groupId>com.google.inject</groupId>