GUACAMOLE-773: Update all Java dependencies to latest stable versions.

extensions/guacamole-auth-json/pom.xml

@@ -52,10 +52,6 @@
             <groupId>com.google.inject</groupId>
             <artifactId>guice</artifactId>
         </dependency>
-        <dependency>
-            <groupId>com.google.inject.extensions</groupId>
-            <artifactId>guice-multibindings</artifactId>
-        </dependency>
 
         <!-- Jackson for JSON support -->
         <dependency>
@@ -81,7 +77,7 @@
         <dependency>
             <groupId>org.springframework.security</groupId>
             <artifactId>spring-security-web</artifactId>
-            <version>5.4.1</version>
+            <version>5.4.5</version>
         </dependency>
 
     </dependencies>