fix: javadoc issue

updated javadoc plugin

Author: Alex-GF

pom.xml

@@ -261,7 +261,7 @@
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-javadoc-plugin</artifactId>
-				<version>2.9.1</version>
+				<version>3.4.1</version>
 				<executions>
 					<execution>
 						<id>attach-javadocs</id>

src/main/java/io/github/isagroup/PricingContext.java

@@ -101,7 +101,7 @@ public Boolean userAffectedByPricing() {
      * the user
      * from the configuration.
      * 
-     * @return List of strings with the current user's contracted add-ons. Add-on names
+     * @return {@code List<String>} with the current user's contracted add-ons. Add-on names
      *         should be the same as in the pricing configuration file.
      * 
      */
@@ -114,7 +114,7 @@ public Boolean userAffectedByPricing() {
      * Key "plan" contains the plan name of the user.
      * Key "addOns" contains a list with the add-ons contracted by the user.
      * 
-     * @return Map<String, Object> with the current user's contracted subscription.
+     * @return {@code Map<String, Object>} with the current user's contracted subscription.
      */
     public final Map<String, Object> getUserSubscription() {
         Map<String, Object> userSubscription = new HashMap<>();