Upgrade snakeyaml to 2.0

Author: jericks

pom.xml

@@ -301,7 +301,7 @@
         <dependency>
             <groupId>org.yaml</groupId>
             <artifactId>snakeyaml</artifactId>
-            <version>1.33</version>
+            <version>2.0</version>
         </dependency>
         <dependency>
             <groupId>com.lowagie</groupId>