make snakeyaml transitive, governance rule relies on this dependency to work. (#3659)

Author: chickenlj

dubbo-all/pom.xml

@@ -420,6 +420,10 @@
             <groupId>com.google.code.gson</groupId>
             <artifactId>gson</artifactId>
         </dependency>
+        <dependency>
+            <groupId>org.yaml</groupId>
+            <artifactId>snakeyaml</artifactId>
+        </dependency>
 
         <!-- Temporarily add this part to exclude transitive dependency -->
         <dependency>