update extension to quarkus 1.4.2
diff --git a/extensions/quarkus/pom.xml b/extensions/quarkus/pom.xml
index ccb4e19..db05ecc 100644
--- a/extensions/quarkus/pom.xml
+++ b/extensions/quarkus/pom.xml
@@ -43,7 +43,7 @@
     </modules>
 
     <properties>
-        <quarkus.version>1.4.1.Final</quarkus.version>
+        <quarkus.version>1.4.2.Final</quarkus.version>
     </properties>
 
     <build>
diff --git a/extensions/quarkus/showcase/README.md b/extensions/quarkus/showcase/README.md
index 7587c29..8f7d88c 100644
--- a/extensions/quarkus/showcase/README.md
+++ b/extensions/quarkus/showcase/README.md
@@ -16,7 +16,9 @@
 
 ## Native mode
 
-For native mode you need at least [graalvm 20](https://github.com/graalvm/graalvm-ce-builds/releases/tag/vm-20.0.0), see graalvm instalation [instructions here](https://quarkus.io/guides/building-native-image).
+For native mode you need [graalvm 19.3.1](https://github.com/graalvm/graalvm-ce-builds/releases/tag/vm-19.3.1), see graalvm instalation [instructions here](https://quarkus.io/guides/building-native-image).
+
+> Note that for now `native mode` is not working on GraalVM **20.0.0** 
 
 Following is how to `build and run` the native image:
 
diff --git a/extensions/quarkus/showcase/pom.xml b/extensions/quarkus/showcase/pom.xml
index d679732..5eebdeb 100644
--- a/extensions/quarkus/showcase/pom.xml
+++ b/extensions/quarkus/showcase/pom.xml
@@ -25,7 +25,7 @@
     <name>Apache MyFaces Core 2.3-next - Extensions - Quarkus - Showcase</name>
 
     <properties>
-        <quarkus.version>1.4.1.Final</quarkus.version>
+        <quarkus.version>1.4.2.Final</quarkus.version>
         <myfaces.version>2.3-next-SNAPSHOT</myfaces.version>
         <failsafe.version>2.22.0</failsafe.version>
         <surefire.version>2.22.0</surefire.version>
@@ -33,6 +33,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>
+        <maven.compiler.release>8</maven.compiler.release>
     </properties>
 
     <dependencyManagement>