Bump ed25519 from 1.3.0 to 1.4.0

Bumps [ed25519](https://github.com/RubyCrypto/ed25519) from 1.3.0 to 1.4.0.
- [Changelog](https://github.com/RubyCrypto/ed25519/blob/main/CHANGES.md)
- [Commits](RubyCrypto/ed25519@v1.3.0...v1.4.0)

---
updated-dependencies:
- dependency-name: ed25519
  dependency-version: 1.4.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Gemfile.lock

@@ -111,7 +111,7 @@ GEM
     crass (1.0.6)
     date (3.4.1)
     drb (2.2.3)
-    ed25519 (1.3.0)
+    ed25519 (1.4.0)
     erb (5.0.2)
     erubi (1.13.1)
     execjs (2.10.0)