Bump BouncyCastle.Cryptography from 2.3.1 to 2.5.0 (#358)

Bumps [BouncyCastle.Cryptography](https://github.com/bcgit/bc-csharp) from 2.3.1 to 2.5.0.
- [Commits](bcgit/bc-csharp@release-2.3.1...release-2.5.0)

---
updated-dependencies:
- dependency-name: BouncyCastle.Cryptography
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

tests/NRedisStack.Tests/NRedisStack.Tests.csproj

@@ -30,7 +30,7 @@
     <PackageReference Include="StackExchange.Redis" Version="2.8.16" />
     <PackageReference Include="xunit" Version="2.4.1" />
     <PackageReference Include="xunit.assert" Version="2.4.1" />
-    <PackageReference Include="BouncyCastle.Cryptography" Version="2.3.1" />
+    <PackageReference Include="BouncyCastle.Cryptography" Version="2.5.0" />
     <PackageReference Include="Microsoft.Azure.StackExchangeRedis" Version="3.1.0" />
   </ItemGroup>