POM: update pom-scijava parent to 18.0.0

This upgrades the ImageJ software stack that ships with the kernel.

Author: ctrueden

pom.xml

@@ -5,11 +5,11 @@
 	<parent>
 		<groupId>org.scijava</groupId>
 		<artifactId>pom-scijava</artifactId>
-		<version>16.1.0</version>
+		<version>18.0.0</version>
 	</parent>
 
 	<artifactId>scijava-jupyter-kernel</artifactId>
-	<version>0.5.2-SNAPSHOT</version>
+	<version>0.6.0-SNAPSHOT</version>
 
 	<name>scijava-jupyter-kernel</name>
 	<description>SciJava polyglot kernel for Jupyter.</description>