bump ADDLib version

pom.xml

@@ -220,7 +220,7 @@ limitations under the License.
         <tidy-pom.version>1.2.0</tidy-pom.version>
 
         <!-- dependency versions -->
-        <addlib.version>2.0.20-BETA-SNAPSHOT</addlib.version>
+        <addlib.version>3.0.0</addlib.version>
         <assertj.version>3.17.1</assertj.version>
         <buildergen.version>0.1</buildergen.version>
         <brics-automaton.version>1.12-4</brics-automaton.version>
@@ -598,20 +598,6 @@ limitations under the License.
         </dependencies>
     </dependencyManagement>
 
-    <repositories>
-        <!-- explicitly name maven-central, so it is queried first -->
-        <repository>
-            <id>maven-central</id>
-            <name>Maven Central Repository</name>
-            <url>https://repo.maven.apache.org/maven2/</url>
-        </repository>
-        <repository>
-            <id>sonatype-nexus-snapshots</id>
-            <name>Sonatype Nexus Snapshots</name>
-            <url>https://oss.sonatype.org/content/repositories/snapshots</url>
-        </repository>
-    </repositories>
-
     <!--
     ================================= BUILD PLUGINS =============================
     -->