Fixed unbounded range in pom.xml

When using the actual snap in another project I get the following maven error:

> [INFO] Failed to resolve artifact.
> 
> Unable to get dependency information: Unable to read the metadata file for artifact 'net.schmizz:sshj:jar': Invalid JDK version in profile 'doclint-java8-disable': Unbounded range: [1.8, for project net.schmizz:sshj
>   net.schmizz:sshj:jar:0.10.1-SNAPSHOT

Fixed by bounding the version range.