kubernetes apiのバージョンアップ (#937)

Co-authored-by: m-takata <[email protected]>

Author: m-takata

pom.xml

@@ -560,13 +560,13 @@
         <dependency>
             <groupId>io.kubernetes</groupId>
             <artifactId>client-java</artifactId>
-            <version>12.0.1</version>
+            <version>18.0.0</version>
         </dependency>
 
         <dependency>
             <groupId>io.kubernetes</groupId>
             <artifactId>client-java-api</artifactId>
-            <version>12.0.1</version>
+            <version>18.0.0</version>
         </dependency>
 
         <dependency>