Fix the CVE-2020-8908, by bumping guava (#42)

Author: ddasarathan

pom.xml

@@ -23,7 +23,7 @@
     <parent>
         <groupId>com.github.jcustenborder.kafka.connect</groupId>
         <artifactId>kafka-connect-parent</artifactId>
-        <version>2.2.1-cp1</version>
+        <version>2.8.0-1</version>
     </parent>
     <artifactId>kafka-connect-redis</artifactId>
     <version>0.0.2-SNAPSHOT</version>