update skywalking agent core (#12)

Author: JaredTan95

pom.xml

@@ -18,7 +18,7 @@
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <skywalking.version>6.5.0</skywalking.version>
+        <skywalking.version>6.6.0</skywalking.version>
         <shade.package>org.apache.skywalking.apm.dependencies</shade.package>
         <shade.net.bytebuddy.source>net.bytebuddy</shade.net.bytebuddy.source>
         <shade.net.bytebuddy.target>${shade.package}.${shade.net.bytebuddy.source}</shade.net.bytebuddy.target>