Update sbt to 1.10.0

[steinybot]

Changes:

• Updated sbt to 1.10.0 to work with LTS JDK
• Removed redundant .java-version file
• Updated .gitignore

[steinybot]

There is a note in the README which I don't fully understand. It says that the plugin requires at least Java 8. Why is that? Is that because of the sbt version? Surely that is not a plugin concern to worry about that.

[steinybot]

There is a note in the README which I don't fully understand. It says that the plugin requires at least Java 8. Why is that? Is that because of the sbt version? Surely that is not a plugin concern to worry about that.

Oh I see, that's a JGit requirement. I see that in JGit 6 that minimum requirement is going up to Java 11.

[SethTisue]

Thank you! (I got rid of the .gitignore changes, though, I think it's better for people to have all that stuff in their personal global git config, rather than keeping a copy it in every OSS repo.)