[DOXIA-592] Upgrade Markdown parser - flexmark to 0.42.8

diff --git a/doxia-modules/doxia-module-markdown/pom.xml b/doxia-modules/doxia-module-markdown/pom.xml
index f11d774..1097190 100644
--- a/doxia-modules/doxia-module-markdown/pom.xml
+++ b/doxia-modules/doxia-module-markdown/pom.xml
@@ -55,7 +55,14 @@
     <dependency>
       <groupId>com.vladsch.flexmark</groupId>
       <artifactId>flexmark-all</artifactId>
-      <version>0.40.12</version>
+      <version>0.42.8</version>
+      <exclusions>
+        <!-- exclude to PDF converter -->
+        <exclusion>
+          <groupId>com.vladsch.flexmark</groupId>
+          <artifactId>flexmark-pdf-converter</artifactId>
+        </exclusion>
+      </exclusions>
     </dependency>
     <dependency>
       <groupId>org.apache.maven.doxia</groupId>
diff --git a/doxia-modules/doxia-module-markdown/src/main/java/org/apache/maven/doxia/module/markdown/FlexmarkDoxiaExtension.java b/doxia-modules/doxia-module-markdown/src/main/java/org/apache/maven/doxia/module/markdown/FlexmarkDoxiaExtension.java
index 9233148..48edc83 100644
--- a/doxia-modules/doxia-module-markdown/src/main/java/org/apache/maven/doxia/module/markdown/FlexmarkDoxiaExtension.java
+++ b/doxia-modules/doxia-module-markdown/src/main/java/org/apache/maven/doxia/module/markdown/FlexmarkDoxiaExtension.java
@@ -19,8 +19,8 @@
  * under the License.
  */
 
-import com.vladsch.flexmark.Extension;
 import com.vladsch.flexmark.html.HtmlRenderer;
+import com.vladsch.flexmark.util.builder.Extension;
 import com.vladsch.flexmark.util.options.DataKey;
 import com.vladsch.flexmark.util.options.MutableDataHolder;
 
diff --git a/doxia-modules/doxia-module-markdown/src/main/java/org/apache/maven/doxia/module/markdown/MarkdownParser.java b/doxia-modules/doxia-module-markdown/src/main/java/org/apache/maven/doxia/module/markdown/MarkdownParser.java
index b9a2e14..641d3df 100644
--- a/doxia-modules/doxia-module-markdown/src/main/java/org/apache/maven/doxia/module/markdown/MarkdownParser.java
+++ b/doxia-modules/doxia-module-markdown/src/main/java/org/apache/maven/doxia/module/markdown/MarkdownParser.java
@@ -19,7 +19,6 @@
  * under the License.
  */
 
-import com.vladsch.flexmark.Extension;
 import com.vladsch.flexmark.ast.Heading;
 import com.vladsch.flexmark.ast.HtmlCommentBlock;
 import com.vladsch.flexmark.util.ast.Node;
@@ -27,6 +26,7 @@
 import com.vladsch.flexmark.html.HtmlRenderer;
 import com.vladsch.flexmark.profiles.pegdown.Extensions;
 import com.vladsch.flexmark.profiles.pegdown.PegdownOptionsAdapter;
+import com.vladsch.flexmark.util.builder.Extension;
 import com.vladsch.flexmark.util.options.MutableDataHolder;
 import org.apache.commons.lang3.StringEscapeUtils;
 import org.apache.commons.lang3.StringUtils;
@@ -62,7 +62,7 @@
  * @author Julien Nicoulaud
  * @since 1.3
  */
-@Component( role = Parser.class, hint = "markdown" )
+@Component( role = Parser.class, hint = MarkdownParser.ROLE_HINT )
 public class MarkdownParser
     extends AbstractParser
 {