HV-2071 Set JDK 21 as a minimum required for the build

Author: marko-bekhta

README.md

@@ -75,7 +75,7 @@ the Apache Software License 2.0. Refer to license.txt for more information.
 ## Build from Source
 
 You can build Hibernate Validator from source by cloning the git repository `git://github.com/hibernate/hibernate-validator.git`.
-You will also need a JDK 17+ and Maven 3 (>= 3.9.8). With these prerequisites in place you can compile the source via:
+You will also need a JDK 21+ and Maven 3 (>= 3.9.9). With these prerequisites in place you can compile the source via:
 
     mvn clean install
 

pom.xml

@@ -403,7 +403,7 @@
 
         <!-- JDK version required for the build -->
         <!-- Remember to update README when changing the version here. -->
-        <jdk.min.version>17</jdk.min.version>
+        <jdk.min.version>21</jdk.min.version>
         <!-- Maven version required for the build -->
         <!--
             When changing the version here, remember to:
@@ -1692,9 +1692,6 @@
                                 <configuration>
                                     <rules>
                                         <requireReleaseDeps />
-                                        <requireJavaVersion>
-                                            <version>[17,18)</version>
-                                        </requireJavaVersion>
                                     </rules>
                                     <fail>true</fail>
                                 </configuration>