Set scope of imagej dependency to "provided"

As described by @stelfrich in [`example-script-collection` PR-2][1]

[1]: https://github.com/imagej/example-script-collection/pull/2

pom.xml

@@ -100,6 +100,7 @@
 		<dependency>
 			<groupId>net.imagej</groupId>
 			<artifactId>imagej</artifactId>
+			<scope>provided</scope>
 		</dependency>
 	</dependencies>
 </project>