Metal 9.0.0

This release includes a major improvement and a big change:

1. Cycle detection has been improved by implementing a cache. This means that using Sub Tokens is now considerably faster, especially in large-scale and/or nested situations.
2. Metal now requires at least a JRE of version 11 instead of 8.

Additionally, some smaller changes have been made. Most significantly:

1. An exception is no longer thrown when a Def is parsed with a size greater than Integer.MAX_VALUE.
2. Many ValueExpressions now have Shorthand versions where arguments and return value are of type SingleValueExpression. This improves usability by no longer requiring wrapping everything in last(...)-expressions when no lists are involved.
3. A minimal set of Javadoc has been added to the Shorthand, to make Metal easier to use especially when using an IDE.

For a more detailed description, please see the 9.0.0 Milestone.