Update scala-library, scala-reflect to 2.13.6

[scala-steward]

Updates

• org.scala-lang:scala-library
• org.scala-lang:scala-reflect

from 2.12.13 to 2.13.6.

I'll automatically update this PR to resolve conflicts as long as you don't change it yourself.

If you'd like to skip this version, you can just close this PR. If you have any feedback, just mention me in the comments below.

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Have a fantastic day writing Scala!

Ignore future updates

Add this to your .scala-steward.conf file to ignore future updates of this dependency:

updates.ignore = [ { groupId = "org.scala-lang" } ]

labels: library-update, semver-minor

[stevedlawrence]

We should just close this PR.

There's a significant amount of changes needed to get Daffodil compiling on 2.13.x, and we have an bug already open for this issue: DAFFODIL-2152. Also, PR #246 has some initial changes to get 2.13 to work. That PR is likely too old to cleanly rebase, but that is a better reference for 2.13 updates than this PR.