Bump curve25519-dalek from 3.0.2 to 3.1.0

Bumps [curve25519-dalek](https://github.com/dalek-cryptography/curve25519-dalek) from 3.0.2 to 3.1.0.
- [Release notes](https://github.com/dalek-cryptography/curve25519-dalek/releases)
- [Changelog](https://github.com/dalek-cryptography/curve25519-dalek/blob/main/CHANGELOG.md)
- [Commits](https://github.com/dalek-cryptography/curve25519-dalek/compare/3.0.2...3.1.0)

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

Cargo.lock

@@ -817,9 +817,9 @@ dependencies = [
 
 [[package]]
 name = "curve25519-dalek"
-version = "3.0.2"
+version = "3.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f627126b946c25a4638eec0ea634fc52506dea98db118aae985118ce7c3d723f"
+checksum = "639891fde0dbea823fc3d798a0fdf9d2f9440a42d64a78ab3488b0ca025117b3"
 dependencies = [
  "byteorder",
  "digest 0.9.0",