adaptation du projet library en java8

pom.xml

@@ -28,7 +28,7 @@
         <github.global.server>github</github.global.server>
         <additionalparam>-Xdoclint:none</additionalparam>
         <!-- Skip error check for javadoc -->
-        <maven.compiler.release>11</maven.compiler.release>
+        <maven.compiler.release>8</maven.compiler.release>
         <maven.deploy.skip>true</maven.deploy.skip><!-- prevent this to be deployed to maven central as "core",
         we only want submodules, see also https://stackoverflow.com/questions/7446599/how-to-deploy-only-the-sub-modules-using-maven-deploy-->
 
@@ -247,7 +247,7 @@
                         <configuration>
                             <toolchains>
                                 <jdk>
-                                    <version>11</version>
+                                    <version>8</version>
                                     <vendor>adopt</vendor>
                                 </jdk>
                             </toolchains>