Bump System.CommandLine from 2.0.5 to 2.0.6 (#25)

---
updated-dependencies:
- dependency-name: System.CommandLine
  dependency-version: 2.0.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]

Directory.Packages.props

@@ -32,7 +32,7 @@
     <PackageVersion Include="MSTest.TestAdapter" Version="3.7.0" />
     <PackageVersion Include="MSTest.TestFramework" Version="3.7.0" />
     <PackageVersion Include="Octokit" Version="14.0.0" />
-    <PackageVersion Include="System.CommandLine" Version="2.0.5" />
+    <PackageVersion Include="System.CommandLine" Version="2.0.6" />
     <PackageVersion Include="TUnit" Version="0.6.0" />
     <PackageVersion Include="TUnit.Assertions" Version="0.6.0" />
     <PackageVersion Include="TUnit.Engine" Version="0.6.0" />