Bump NUnit.Analyzers from 4.3.0 to 4.4.0 (#148)

Bumps [NUnit.Analyzers](https://github.com/nunit/nunit.analyzers) from 4.3.0 to 4.4.0.
- [Release notes](https://github.com/nunit/nunit.analyzers/releases)
- [Changelog](https://github.com/nunit/nunit.analyzers/blob/master/CHANGES.md)
- [Commits](nunit/nunit.analyzers@4.3.0...4.4.0)

---
updated-dependencies:
- dependency-name: NUnit.Analyzers
  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]

Directory.Build.props

@@ -28,7 +28,7 @@
     <MicrosoftNetTestSdkVersion>17.12.0</MicrosoftNetTestSdkVersion>
     <NUnit3Version>3.14.0</NUnit3Version>
     <NUnit4Version>4.2.2</NUnit4Version>
-    <NUnitAnalyzersVersion>4.3.0</NUnitAnalyzersVersion>
+    <NUnitAnalyzersVersion>4.4.0</NUnitAnalyzersVersion>
     <NUnitTestAdapterVersion>4.6.0</NUnitTestAdapterVersion>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)' == 'Release' ">