Cleanup some IntelliJ IDEA warnings

Cleaning up some warnings for the first time in many eons.

pom.xml

@@ -19,7 +19,7 @@
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-classic</artifactId>
-            <version>1.2.3</version>
+            <version>1.4.5</version>
         </dependency>
         <dependency>
             <groupId>junit</groupId>
@@ -30,13 +30,13 @@
         <dependency>
             <groupId>org.mockito</groupId>
             <artifactId>mockito-core</artifactId>
-            <version>3.12.4</version>
+            <version>4.8.0</version>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>commons-cli</groupId>
             <artifactId>commons-cli</artifactId>
-            <version>1.4</version>
+            <version>1.5.0</version>
         </dependency>
     </dependencies>
 
@@ -79,8 +79,8 @@
                 <version>3.7.0</version>
                 <configuration>
                     <compilerArgument>-Xlint:unchecked</compilerArgument>
-                    <source>1.7</source>
-                    <target>1.7</target>
+                    <source>11</source>
+                    <target>11</target>
                 </configuration>
             </plugin>