Use 1.8.1 instead of 1.8.0.

Author: dongjoon-hyun

sql/core/pom.xml

@@ -132,7 +132,7 @@
     <dependency>
       <groupId>org.apache.avro</groupId>
       <artifactId>avro</artifactId>
-      <version>1.8.0</version>
+      <version>1.8.1</version>
       <scope>test</scope>
     </dependency>
     <dependency>