Bump Scala to 2.13.18

[Copilot]

Updates Scala from 2.13.16 to 2.13.18. Scala 2.13.18 has stricter eta-expansion rules and changes how annotation trees with macro-generated defaults are handled.

Changes

Version Update

• project/Commons.scala: scalaVersion → 2.13.18
• Regenerated .github/workflows/ci.yml via sbt githubWorkflowGenerate

Redis Eta-Expansion Fixes

Explicit eta-expansion now required for case class constructors as function values:

// Before: XConsumerInfo.apply
// After: XConsumerInfo.apply(_)
val multiBulkAsXConsumerInfo: ReplyDecoder[XConsumerInfo] =
  flatMultiBulkAsMap(bulkAsUTF8, undecoded).andThen(XConsumerInfo.apply(_))

Mongo Method Disambiguation

Added explicit parameter lists to distinguish overloaded methods:

// Before: def listDatabases: Observable[Document]
// After: def listDatabases(): Observable[Document]
def listDatabases[T: GenCodec]: Observable[T] = listDatabases().map(...)

Macro Null Safety

Annotation trees can now be null for parameters with macro-generated defaults. Added filtering throughout MacroCommons.scala:

rawAnnotations(ss).filter(_.tree != null)

Known Issue

NewRpcMetadataTest fails to compile - Scala 2.13.18 returns null annotation trees for @infer parameters with macro-generated defaults. Production code unaffected. Requires upstream Scala fix or test refactoring.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• https://api.github.com/repos/scala/scala/releases
  • Triggering command: curl -s REDACTED (http block)
• www.scala-lang.org
  • Triggering command: curl -s REDACTED (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

bump scala to 2.13.18

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