RFR: JDK-8275308: Add valueOf(Runtime.Version) factory to SourceVersion [v5]

[Joe Darcy]

On Mon, 25 Oct 2021 22:11:02 GMT, Michael Bien <duke at openjdk.java.net> wrote:

> 
> 
> would the doc need `@since 18` tags?

Sure; added.

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PR: https://git.openjdk.java.net/jdk/pull/5973