Bump System.CodeDom from 6.0.0 to 7.0.0 (#153)

Bumps [System.CodeDom](https://github.com/dotnet/runtime) from 6.0.0 to 7.0.0.
- [Release notes](https://github.com/dotnet/runtime/releases)
- [Commits](https://github.com/dotnet/runtime/commits)

---
updated-dependencies:
- dependency-name: System.CodeDom
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

src/common.props

@@ -12,7 +12,7 @@
     <XunitVersion>2.4.2</XunitVersion>
     <XunitRunnerVersion>2.4.2</XunitRunnerVersion>
     <TestSdkVersion>17.5.0</TestSdkVersion>
-    <CodeDomVersion>6.0.0</CodeDomVersion>
+    <CodeDomVersion>7.0.0</CodeDomVersion>
     <TeamCityVersion>3.0.13</TeamCityVersion>
     <SystemRuntimeLoaderVersion>4.3.0</SystemRuntimeLoaderVersion>
     <DependencyModelVersion>5.0.0</DependencyModelVersion>