Bump NonBlocking from 2.1.1 to 2.1.2 (#55)

Bumps [NonBlocking](https://github.com/VSadov/NonBlocking) from 2.1.1 to 2.1.2.
- [Release notes](https://github.com/VSadov/NonBlocking/releases)
- [Commits](VSadov/NonBlocking@v2.1.1...v2.1.2)

---
updated-dependencies:
- dependency-name: NonBlocking
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

src/FastCache.Cached/FastCache.Cached.csproj

@@ -24,7 +24,7 @@ Credit to Vladimir Sadov for his implementation of NonBlocking.ConcurrentDiction
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
-    <PackageReference Include="NonBlocking" Version="2.1.1" />
+    <PackageReference Include="NonBlocking" Version="2.1.2" />
   </ItemGroup>
 
   <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard2.0' ">