[MPLUGIN-369] - Upgrade ASM Api version to ASM9 in visitors - in sync with the current ASM version.

This fixes the "Record requires ASM8" problem when Records are used in a Mojo.

This closes #32

Author: vovkss

maven-plugin-tools-annotations/src/main/java/org/apache/maven/tools/plugin/extractor/annotations/scanner/visitors/MojoAnnotationVisitor.java

@@ -41,7 +41,7 @@ public class MojoAnnotationVisitor
 
     MojoAnnotationVisitor( Logger logger, String annotationClassName )
     {
-        super( Opcodes.ASM7 );
+        super( Opcodes.ASM9 );
         this.logger = logger;
         this.annotationClassName = annotationClassName;
     }

maven-plugin-tools-annotations/src/main/java/org/apache/maven/tools/plugin/extractor/annotations/scanner/visitors/MojoClassVisitor.java

@@ -53,7 +53,7 @@ public class MojoClassVisitor
 
     public MojoClassVisitor( Logger logger )
     {
-        super( Opcodes.ASM7 );
+        super( Opcodes.ASM9 );
         this.logger = logger;
     }
 

maven-plugin-tools-annotations/src/main/java/org/apache/maven/tools/plugin/extractor/annotations/scanner/visitors/MojoFieldVisitor.java

@@ -44,7 +44,7 @@ public class MojoFieldVisitor
 
     MojoFieldVisitor( Logger logger, String fieldName, String className )
     {
-        super( Opcodes.ASM7 );
+        super( Opcodes.ASM9 );
         this.logger = logger;
         this.fieldName = fieldName;
         this.className = className;