Add support for updating Forge in the dependencies panel.

[TheOnlyTails]

IntelliJ 2021.2 introduced a new "dependencies" panel, which is used to manage the Gradle/Maven dependencies in a project, as well as update them when new versions become available.

I suggest modifying this panel to detect whenever a Forge (minecraft) dependency is installed and suggest updates to newer versions as they become available.
This can work for dependencies using fg.deobf, which currently don't show up in the panel at all.

[stale]

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