v0.3.1

A maintenance release. There are no library code changes — this is a dependency
refresh on top of 0.3.0, plus a couple of build/CI fixes.

Dependency updates

• Bouncy Castle 1.84 → 1.85 (bcprov-jdk18on, used for NKey Ed25519 signing)
• jsoniter-scala 2.38.14 → 2.38.17
• Scala 3.3.7 → 3.3.8
• munit 1.3.2 → 1.3.4, scalafmt 3.11.1 → 3.11.3
• sbt 1.12.11 → 1.12.13, sbt-typelevel 0.8.6 → 0.8.7

Build & CI

• Scala Steward now pins sbt to the 1.x line. sbt 2 is a breaking rewrite of the
  build definition, so that move stays a deliberate migration rather than
  something picked up from an automated dependency PR (#36)
• The Validate Steward Config CI job runs on JDK 17 — it was failing on JDK 11,
  which scala-steward no longer supports

Compatibility

• Binary compatible with 0.3.0 (MiMa-checked); no source changes required
• Scala 3, cats-effect 3.7, fs2 3.13; JDK 11+

What's Changed

• Patch updates by @ThatScalaGuy in #28
• Test library updates by @ThatScalaGuy in #27
• Patch updates by @ThatScalaGuy in #29
• Patch updates by @ThatScalaGuy in #31
• Typelevel & FS2 updates by @ThatScalaGuy in #34
• Pin sbt to the 1.x line for Scala Steward by @ThatScalaGuy in #36
• Patch updates by @ThatScalaGuy in #33
• Test library updates by @ThatScalaGuy in #32
• Other dependency updates by @ThatScalaGuy in #35

Full Changelog: v0.3.0...v0.3.1